feat: Add CircleCI configuration

[davidffrench]

Motivation

https://issues.jboss.org/browse/AEROGEAR-8364

What

Adding CircleCI configuration to this repo

Why

Automatically run tests and docker builds on PRs and tags.

How

• Adding a circleci config
• Creating the repo in circleci, coveralls and dockerhub. Adding the correct env vars

Verification Steps

Check the CircleCI job run against this PR passes.

Progress

• Finished task
• TODO

[austincunningham]

Any way to not store credentials in the clear

[davidffrench]

yes there is, they can be stored as environment variables in circleci. I don't believe it will an issue though as it is a temporary database to run integration tests. @darahayes can you confirm?

[austincunningham]

some info on it here https://circleci.com/docs/2.0/env-vars/

[austincunningham]

looks good to me, verified the ci is working on this pr

[damienomurchu]

Good work @davidffrench - noticed the below warning on the CI build, just fyi:

# -------- WARNING ---------
# Your config does not conform to the schema.
# Violations are listed below:
# 
# ERROR IN CONFIG FILE:
# [#/jobs/build] only 1 subschema matches out of 2
# 1. [#/jobs/build/docker/1] extraneous key [ports] is not permitted
# |   Permitted keys:
# |     - image
# |     - name
# |     - entrypoint
# |     - command
# |     - user
# |     - environment
# |     - aws_auth
# |     - auth
# |   Passed keys:
# |     - image
# |     - ports
# |     - environment

(https://circleci.com/gh/aerogear/mobile-security-service/16#config/containers/0)

[davidffrench]

Thanks @damienomurchu. I will wait until we have integration tests to run in postgres to make sure it is working. Looks like the $DATABASE_URL might need to be specified to satisfy the circleci schema for the port. https://circleci.com/docs/2.0/postgres-config/#example-environment-setup