Expose port 80 for the christmas-community service (#32)

* Expose port 80 for the christmas-community service

If the app is ran with docker-compose, the express server (port 80) should be open as well

* Change default ports to 3000 and 8080 for Express and DB respectively

Also modified the initial config to include a default DB port if not provided in the env

* Forward only port 80 and don't expose database by default in the config file

Database is still being exposed through the Dockerfile, as it already was

* Restore formatting for config/index.js

docker-compose.debug.yml

@@ -7,6 +7,6 @@ services:
     environment:
       NODE_ENV: development
     ports:
-      - 3000:3000
+      - 80:80
       - 9229:9229
     command: node --inspect=0.0.0.0:9229 index.js

docker-compose.yml

@@ -7,4 +7,4 @@ services:
     environment:
       NODE_ENV: production
     ports:
-      - 3000:3000
+      - 80:80