Docker-compose

[ohtake]

This PR will:

• make docker-compose working again
• install ffmpeg to support audio recording feature

[jakerenzella]

@ohtake Looks like it just might be missing LaTeX distribution? Otherwise, this is a good base for adding the rest of the native dependencies, I will pull this down and run the tests.

[ohtake]

It installs TeX Live at line 32, but I have not tested the TeX feature.

[akashagarwal7]

Did you try running this for dev environment which requires Postgres? AFAIK you need: libpq-dev https://pypi.org/project/libpq-dev/

[macite]

Perhaps with this workflow we should look at dropping the separation between the two and just use MySQL in development and production.

[akashagarwal7]

Sounds good to me :) That'd help with the emoji thingy as well.

[ohtake]

libpq-dev has been moved from line 9 to line 20.
This change was not intended.
I will update the commit to minimize changes.

[ohtake]

Two tests passed:

• (ffmpeg) Submit audio comments and listen to them
• (latex) Submit tasks and view the generated PDFs

Shall I separte MySQL in this PR?
Or it should be in another PR?

[jakerenzella]

@ohtake Looks good so far, let's just keep it in this PR, we can merge when ready 👍

[ohtake]

I had a talk with @jakerenzella about reloading the API without restarting a Docker container.
Excluding .bundle and tmp directories enables Dockerized rails app to reload itself.

Similar approach may be applied to the web project but it requires modifications on Grunt tasks.
Changes for the web are commented out for now.

[ohtake]

Finally, managed to dockerize the api and web with live-reloading feature.
Changes in source code will be automatically applied to Docker containers without restarting them.

Usage

export DF_DOCKER_MACHINE_IP=192.0.2.1 # Replace it for your own env
cd doubtfire-api
docker-compose build
docker-compose up -d
# wait a few seconds
docker-compose exec api bundle exec rake db:populate

Open http://localhost:8000/ for Angular 1 project ('development' branch in web) or http://localhost:4200/ for Angular 6 project ('quality/decafinate' branch in web).

Merging strategy

Because of dependencies and duplicated commits, it is better to merge PRs in the following order.

1. Merge Support Docker on Windows doubtfire-web#129 into 'development'
2. Merge 'development' into 'quality/decafinate'
3. Rebase Dockerize (Angular 6 + 1) doubtfire-web#133 onto 'quality/decafinate'
4. Merge Dockerize (Angular 6 + 1) doubtfire-web#133 into 'quality/decafinate'
5. Merge this PR