Docker Container: Init 1 & Initialisation

- Now using a setup script before starting the app. The separation of
the run script and the setup script will make service initialisation a
little bit clearer
- Now calling start.sh script as ENTRYPOINT and S6 as CMD. This way
when running the container with just a shell script, the start.sh
script will be launched before, making debugging easier
- Added note about `.dockerignore` ignored during Docker Hub Automated
Build

Dockerfile

@@ -18,4 +18,5 @@ RUN ./docker/build.sh
 # Configure Docker Container
 VOLUME ["/data"]
 EXPOSE 22 3000
-CMD ["docker/start.sh"]
+ENTRYPOINT ["docker/start.sh"]
+CMD ["/usr/bin/s6-svscan", "/app/gogs/docker/s6/"]