Docker environment setup

[zahid]

To test this, follow this setup

docker-compose up -d client api

Then run:

docker-compose ps
 Name             Command             State                   Ports
----------------------------------------------------------------------------------
api      node index.js                Exit 0
client   echo hello from dnd client   Exit 0
db       /entrypoint.sh mongod        Up       27017/tcp, 0.0.0.0:27019->27019/tcp