cheap feature branch deploy

cheap-feature-branch-deploy

#script to make ad-hoc cheap deploy for a git feature-branch

input: ubuntu machine IP & root username&password (EC2 or Digitalocean VM)
input will be saved in the github/bitbucet variables and referenced by varname

1. scp docker-compose file for dependent services (e.g. db) to the remote server
2. scp docker file + the artifact (e.g. war file) to the remote server
3. run the following on remote server (ssh)
	a. install docker & docker-compose
	b. run docker-compose file, make sure sevices start on uniq ports
	c. build docker image
	e. run docker image make sure the app start on uniq port (>= 8080)
4. print the IP/PORT for the running service

------ OUTPUT ------
running app instance with empty database

TODO: the cleanup script