Release 2951

Trello card

https://trello.com/c/0XqBRF04/610-fix-postgres-error-in-all-environments-and-redeploy

Context

there is a postgres error after deployment in all environments because the format of the passed in URL is not the same as that required

Changes proposed in this pull request

Added DB_HOST, DB_USERNAME, DB_PASSWORD variables

Guidance to review

the review,staging and dev endpoints are working