Add GitHub Actions - Continuous Deployment

Author: Shaun B

README.md

@@ -105,4 +105,4 @@
 ```$ docker-compose build --no-cache```
 
 #### Remove images:
-```$ docker rmi $(docker images -q)```
+```$ docker rmi $(docker images -q)```

release.sh

@@ -9,4 +9,5 @@ curl -n -X PATCH https://api.heroku.com/apps/$HEROKU_APP_NAME/formation \
   -d "${PAYLOAD}" \
   -H "Content-Type: application/json" \
   -H "Accept: application/vnd.heroku+json; version=3.docker-releases" \
-  -H "Authorization: Bearer ${HEROKU_AUTH_TOKEN}"
+  -H "Authorization: Bearer ${HEROKU_AUTH_TOKEN}"
+