Add inbound parse webhook example

examples/inbound-parse-docker/.dockerignore

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+node_modules
+npm-debug.log
+Dockerfile*
+docker-compose*
+.dockerignore
+.git
+.gitignore
+.env
+*/bin
+*/obj
+README.md
+LICENSE
+.vscode

examples/inbound-parse-docker/.gitignore

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+node_modules

examples/inbound-parse-docker/CONTRIBUTING.md

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+Hello! Thank you for choosing to help contribute to one of the SendGrid open source libraries. There are many ways you can contribute and help is always welcome.  We simply ask that you follow the following contribution policies.
+
+- [CLAs and CCLAs](#cla)
+- [Roadmap & Milestones](#roadmap)
+- [Feature Request](#feature-request)
+- [Submit a Bug Report](#submit-a-bug-report)
+- [Improvements to the Codebase](#improvements-to-the-codebase)
+- [Understanding the Code Base](#understanding-the-codebase)
+- [Codebase Overview](#codebase-overview)
+- [Testing](#testing)
+- [Style Guidelines & Naming Conventions](#style-guidelines-and-naming-conventions)
+- [Creating a Pull Request](#creating-a-pull-request)
+- [Code Reviews](#code-reviews)
+
+<a name="roadmap"></a>
+We use [Milestones](https://github.com/sendgrid/sendgrid-nodejs/milestones) to help define current roadmaps, please feel free to grab an issue from the current milestone. Please indicate that you have begun work on it to avoid collisions. Once a PR is made, community review, comments, suggestions and additional PRs are welcomed and encouraged.
+
+<a name="cla"></a>
+## CLAs and CCLAs
+
+Before you get started, SendGrid requires that a SendGrid Contributor License Agreement (CLA) be filled out by every contributor to a SendGrid open source project.
+
+Our goal with the CLA is to clarify the rights of our contributors and reduce other risks arising from inappropriate contributions.  The CLA also clarifies the rights SendGrid holds in each contribution and helps to avoid misunderstandings over what rights each contributor is required to grant to SendGrid when making a contribution.  In this way the CLA encourages broad participation by our open source community and helps us build strong open source projects, free from any individual contributor withholding or revoking rights to any contribution.
+
+SendGrid does not merge a pull request made against a SendGrid open source project until that pull request is associated with a signed CLA. Copies of the CLA are available [here](https://gist.github.com/SendGridDX/98b42c0a5d500058357b80278fde3be8#file-sendgrid_cla).
+
+When you create a Pull Request, after a few seconds, a comment will appear with a link to the CLA. Click the link and fill out the brief form and then click the "I agree" button and you are all set. You will not be asked to re-sign the CLA unless we make a change.
+
+There are a few ways to contribute, which we'll enumerate below:
+
+<a name="feature-request"></a>
+## Feature Request
+
+If you'd like to make a feature request, please read this section.
+
+The GitHub [issue tracker](https://github.com/sendgrid/sendgrid-nodejs/issues) is the preferred channel for library feature requests, but please respect the following restrictions:
+
+- Please [**search for existing issues**](https://github.com/search?utf8=%E2%9C%93&q=repo%3Asendgrid%2Fsendgrid-nodejs&type=Issues) in order to ensure we don't have duplicate bugs/feature requests.
+- Please be respectful and considerate of others when commenting on issues
+
+<a name="submit-a-bug-report"></a>
+## Submit a Bug Report
+
+Note: DO NOT include your credentials in ANY code examples, descriptions, or media you make public.
+
+A software bug is a demonstrable issue in the code base. In order for us to diagnose the issue and respond as quickly as possible, please add as much detail as possible into your bug report.
+
+Before you decide to create a new issue, please try the following:
+
+1. [Check the Github issues tab](https://github.com/sendgrid/sendgrid-nodejs/issues) if the identified issue has already been reported, if so, please add a +1 to the existing post.
+2. Update to the latest version of this code and check if issue has already been fixed
+3. Copy and fill in the Bug Report Template we have provided below
+
+### Please use our Bug Report Template
+
+In order to make the process easier, we've included a [sample bug report template](https://github.com/sendgrid/sendgrid-nodejs/blob/master/.github/ISSUE_TEMPLATE) (borrowed from [Ghost](https://github.com/TryGhost/Ghost/)). The template uses [GitHub flavored markdown](https://help.github.com/articles/github-flavored-markdown/) for formatting.
+
+<a name="improvements-to-the-codebase"></a>
+## Improvements to the Codebase
+
+We welcome direct contributions to the sendgrid-nodejs code base. Thank you!
+
+### Development Environment ###
+
+#### Install and Run Locally ####
+
+##### Prerequisites #####
+
+- Node.js version 6, 7 or 8
+- Please see [package.json](https://github.com/sendgrid/sendgrid-nodejs/tree/master/package.json)
+
+##### Initial setup: #####
+
+```bash
+git clone https://github.com/sendgrid/sendgrid-nodejs.git
+cd sendgrid-nodejs
+npm install
+```
+
+## Environment Variables
+
+First, get your free SendGrid account [here](https://sendgrid.com/free?source=sendgrid-nodejs).
+
+You will need to setup the following environment to use the SendGrid examples in the [README.md](https://github.com/sendgrid/sendgrid-nodejs/blob/master/README.md), [USAGE.md](https://github.com/sendgrid/sendgrid-nodejs/blob/master/USAGE.MD) and [USE_CASES.md](https://github.com/sendgrid/sendgrid-nodejs/blob/master/USE_CASES.md) files:
+
+```bash
+echo "export SENDGRID_API_KEY='YOUR_API_KEY'" > sendgrid.env
+echo "sendgrid.env" >> .gitignore
+source ./sendgrid.env
+```
+
+##### Execute: #####
+
+To run an example:
+
+```bash
+touch example.js
+```
+
+Copy the desired code into `example.js`. For this example, I'm assuming you create this file in the root of this project.
+
+Change the path to the Sendgrid library to the relative path, for example: `./packages/mail/mail`.
+
+```bash
+node example.js
+```
+
+<a name="understanding-the-codebase"></a>
+## Understanding the Code Base
+
+This repo is organized as a monorepo with the packages residing in the `./packages` directory. Please see the root [README.md](https://github.com/sendgrid/sendgrid-nodejs/blob/master/README.md) for details.
+
+<a name="codebase-overview"></a>
+## Codebase Overview
+
+This repo is subdivided in 6 main [packages](https://github.com/sendgrid/sendgrid-nodejs/tree/master/packages). Each package has its own dependencies (internal or external) and its own source code in the `src` folder. Each package also has its isolated ReadME files, use cases and usage.md files.
+
+To install a particular packages' dependencies.
+```bash
+cd packages/{NAME}
+npm install or yarn install
+```
+#### Package List
+
+**1. Client**
+This is a  wrapper written on top of the ```request``` module to suite the sendgrid module. All requests made to the sendgrid API are invoked by the `request` function in the `client.js`.
+
+Type declarations: client.d.ts
+Test Cases: client.spec.js
+
+**2. Mail**
+This module exposes the `send` function which send mails via the sdk. This module can be a good starting point to read the source code. 
+
+Type declarations: mail.d.ts
+Test Cases: mail.spec.js
+
+**3. Helpers**
+These are a set of utility functions which all the modules use. Some of them are very basic functions and can be an easy starting point for reading the source code.
+
+<a name="testing"></a>
+## Testing
+
+All PRs require passing tests before the PR will be reviewed.
+
+To run tests, please install Prism first by either running `yarn prism:install` or manually downloading from [the Prism website](https://stoplight.io/platform/prism/).
+
+Next, start Prism in one console window using `yarn prism`.
+
+Open a new console window and run `lerna bootstrap`.
+
+And finally, run `yarn test`, or specific tests e.g. `yarn test:mail` or `yarn test:client`.
+
+<a name="style-guidelines-and-naming-conventions"></a>
+## Style Guidelines & Naming Conventions
+
+Generally, we follow the style guidelines as suggested by the official language. However, we ask that you conform to the styles that already exist in the library. If you wish to deviate, please explain your reasoning.
+
+- [Unofficial Style Guide](https://github.com/felixge/node-style-guide)
+
+Please run your code through:
+
+- [ESLint](http://eslint.org/) with the standard style guide.
+- [esdoc](https://github.com/sendgrid/sendgrid-nodejs/blob/master/.github/USAGE.md) to check the documentation coverage of your added code.
+
+## Creating a Pull Request<a name="creating-a-pull-request"></a>
+
+1. [Fork](https://help.github.com/fork-a-repo/) the project, clone your fork,
+   and configure the remotes:
+
+   ```bash
+   # Clone your fork of the repo into the current directory
+   git clone https://github.com/sendgrid/sendgrid-nodejs
+
+   # Navigate to the newly cloned directory
+   cd sendgrid-nodejs
+
+   # Assign the original repo to a remote called "upstream"
+   git remote add upstream https://github.com/sendgrid/sendgrid-nodejs
+   ```
+
+2. If you cloned a while ago, get the latest changes from upstream:
+
+   ```bash
+   git checkout <dev-branch>
+   git pull upstream <dev-branch>
+   ```
+
+3. Create a new topic branch (off the main project development branch) to
+   contain your feature, change, or fix:
+
+   ```bash
+   git checkout -b <topic-branch-name>
+   ```
+
+4. Commit your changes in logical chunks. Please adhere to these [git commit
+   message guidelines](http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html)
+   or your code is unlikely be merged into the main project. Use Git's
+   [interactive rebase](https://help.github.com/articles/interactive-rebase)
+   feature to tidy up your commits before making them public.
+
+   4a. Create tests.
+
+   4b. Create or update the example code that demonstrates the functionality of this change to the code.
+
+5. Locally merge (or rebase) the upstream development branch into your topic branch:
+
+   ```bash
+   git pull [--rebase] upstream master
+   ```
+
+6. Push your topic branch up to your fork:
+
+   ```bash
+   git push origin <topic-branch-name>
+   ```
+
+7. [Open a Pull Request](https://help.github.com/articles/using-pull-requests/)
+    with a clear title and description against the `master` branch. All tests must be passing before we will review the PR.
+
+If you have any additional questions, please feel free to [email](mailto:dx@sendgrid.com) us or create an issue in this repo.
+
+<a name="code-reviews"></a>
+## Code Reviews
+
+If you can, please look at open PRs and review them. Give feedback and help us merge these PRs much faster! If you don't know how, Github has some [great information on how to review a Pull Request](https://help.github.com/articles/about-pull-request-reviews/).

examples/inbound-parse-docker/Dockerfile

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+FROM node:8.9-alpine
+ENV NODE_ENV production
+WORKDIR /usr/src/app
+COPY ["package.json", "package-lock.json*", "npm-shrinkwrap.json*", "./"]
+RUN npm install --production --silent && mv node_modules ../
+COPY . .
+EXPOSE 3000
+CMD npm start

examples/inbound-parse-docker/LICENSE

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+Copyright (c) 2012-2018 SendGrid, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of
+the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.

examples/inbound-parse-docker/README.md

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+# Introduction
+
+This is an example project for using a Docker container as a [SendGrid](https://sendgrid.com) [inbound parse email](https://sendgrid.com/docs/for-developers/parsing-email/setting-up-the-inbound-parse-webhook/) webhooks.
+
+# Prerequisites
+
+* [Docker CE 18](https://www.docker.com/get-started)
+* (Optional for development) A local Kubernetes installation
+* SendGrid Account with inbound parse enabled to send form data (default)
+    * [Setup Inbound Parse Webhook](https://sendgrid.com/docs/for-developers/parsing-email/setting-up-the-inbound-parse-webhook/)
+* [Ngrok](https://ngrok.com/) or Internet accessible URL
+
+# Usage Locally (aka for Development)
+
+* `mkdir <project>`
+* `cd <project>`
+* `git clone https://github.com/sendgrid/sendgrid-nodejs.git`
+* `cp -R sendgrid-nodejs/examples/inbound-parse-docker/* .`
+* `rm -rf sendgrid-nodejs/`
+* Build the container: `docker-compose build`
+* Run the container: `docker-compose up`
+* (Optional to save your self both commands above) Build & Run the container: `docker-compose build && docker-compose up`
+* Run ngrok: `ngrok http 3000`
+* Create an entry in the [Settings > Inbound Parse](https://app.sendgrid.com/settings/parse) with the ngrok URL.  Use the `https` ngrok entry.
+* Send an email to your inbound parse email address.
+
+NOTE: ngrok has a "replay" feature so you don't have to keep sending emails to yourself.  You can access that when ngrok is running at [http://127.0.0.1:4040/inspect/http](http://127.0.0.1:4040/inspect/http)
+
+# Modifying the application
+
+At the moment, the `app.js` only prints data to the console.  You can extend this project by adding more business logic to the `/parse_webhook` route.
+
+## A note on processing events
+
+This project uses the [express-formidable](https://github.com/utatti/express-formidable) middleware to process the form data sent by SendGrid's Inbound Parse Webhook.  
+
+The events are available in the `/parse_webhook` route in the `req.fields` object.  The [app.js](app.js) contains logging statements for the elements that are available to you.  It may be useful to review the [example-webhook-payload.txt](example-webhook-payload.txt) for what the form data looks like when extending this application.
+
+Attachments: `express-formidable` automatically decodes and stores the images to the `/tmp` directory in the container.  This is configurable by passing a configuration object to the middleware:
+
+```js
+app.use(formidable({
+  encoding: 'utf-8',
+  uploadDir: '/my/dir',
+  multiples: true, // req.files to be arrays of files
+});
+```
+
+Additionally, the [docker-compose](docker-compose.yml) has a volume mapping commented out if you'd prefer to store them in persistent storage outside of the container.
+
+# Deployment to Kubernetes
+
+* In order for Kubernetes to use the container described in this project, the container must be built and stored in a container registry.  You can choose to use a private registry in your cloud provider or a public registry (e.g., Docker Hub).  You can also run a development environment of Kubernetes via [Docker for Mac or Windows](https://www.docker.com/get-started)
+* In this project, the [Kubernetes (k8s) manifest](k8s/inbound-parse.yml) uses the `imagePullPolicy: IfNotPresent` to pull from a local registry on the dev machine running Kubernetes as part of Docker.  If you were deploying to Google Cloud, for example, you should disable that option.
+* `kubectl` is used to deploy.  You should already have a working `kubectl context`.  From the root of the project execute: `kubectl apply -f k8s/inbound-parse.yml`
+
+# Resources
+
+* [Kubernetes Developer Docs](https://kubernetes.io/docs/user-journeys/users/application-developer/foundational/)
+* [Install Kubernetes UI in Docker for Windows/Mac](https://www.ntweekly.com/2018/05/25/deploy-kubernetes-web-ui-dashboard-docker-windows/)
+* [Deploy and Expose Apps in Kubernetes](https://www.ntweekly.com/2018/06/10/deploy-expose-applications-kubernetes-docker-windows/)
+* [Download Docker](https://www.docker.com/get-started)
+
+
+# License
+
+See [LICENSE](LICENSE)
+