Add Deploy to Heroku button

Author: raymondberg

README.md

@@ -1,4 +1,4 @@
-# braintree_php_example
+# Braintree PHP Example
 An example Braintree integration for PHP.
 
 ## Setup Instructions
@@ -25,6 +25,12 @@ An example Braintree integration for PHP.
   php -S localhost:3000 -t public_html
   ```
 
+## Deploying to Heroku
+
+You can deploy this app directly to Heroku to see the app live. Skip the setup instructions above and click the button below. This will walk you through getting this app up and running on Heroku in minutes.
+
+[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy?template=https://github.com/braintree/braintree_php_example&env[BT_ENVIRONMENT]=sandbox)
+
 ## Running Tests
 
 All tests are integration tests. Integration tests make API calls to Braintree and require that you set up your Braintree credentials. You can run this project's integration tests by adding your sandbox API credentials to `.env` and running `./vendor/bin/phpunit --testsuite integration` on the command line.

app.json

@@ -0,0 +1,28 @@
+{
+  "name": "Braintree PHP Example",
+  "description": "An example Braintree integration for PHP",
+  "keywords": ["braintree", "php"],
+  "website": "https://www.braintreepayments.com",
+  "repository": "https://github.com/braintree/braintree_php_example",
+  "logo": "https://avatars1.githubusercontent.com/u/3453",
+  "success_url": "/",
+  "env": {
+    "BT_ENVIRONMENT": {
+      "description": "Run against Braintree sandbox environment",
+      "required": true,
+      "value": "sandbox"
+    },
+    "BT_MERCHANT_ID": {
+      "description": "Your Braintree Merchant ID",
+      "required": true
+    },
+    "BT_PUBLIC_KEY": {
+      "description": "Your Braintree Public Key",
+      "required": true
+    },
+    "BT_PRIVATE_KEY": {
+      "description": "Your Braintree Private Key",
+      "required": true
+    }
+  }
+}