Assign a version to the server and do fortnighly release

[iamareebjamal]

There are several issues with current release process:

• There is no concrete app version which users might use
• master is severely outdated and buggy, development is much more stable
• Building of docker images is done on the live server instead of using prebuilt images
• To use a definite version of docker image, we need to tag releases with versions and just change the version in docker compose file

Let's handle this by merging dev to master and then deciding on other versions and release

[iamareebjamal]

Already happening now.

Only one thing is remaining, that is using image in docker-compose instead of build. That is a one-line fix. Don't know if it should be delayed till CodeHeat. Should be taken into consideration before end of GSOC

The only other thing remaining is that app version is not supplied internally. So, API cannot be queried to know what is the server version