Refactor db.js to use environment variables for mongo connection
Merge pull request #157 from tochiai/refactor/env-var

Refactor db.js to use environment variables for mongo connection
Revert "Refactor db.js to use environment variables for mongo connection"
Merge pull request #158 from gMajr/revert-157-refactor/env-var

Revert "Refactor db.js to use environment variables for mongo connection...
Update README.md