chore(packagejson): add a repo and engine
chore(db): save conn in process.env
chore(app): change port to listen

define in process.env.port

time: 0h:15
chore(log)
chore(env): move envs from config to process.env

allow to publish to open source repos

time: 0h:25
fix(logger): remove file transport

there is a logger in heroku

time: 0h:10
chore(config): join configs