Real local dev

[bengerman13]

Changes proposed in this pull request:

• Add a local cluster for testing. This uses docker-compose to spin up a 2-node ODfE elasticsearch cluster and a kibana instance.
• Add pipeline steps for building and pushing test instances. This will allow us to push these containers as CF apps, which is how I plan to run the e2e tests
• Fix bugs identified while testing
  • handle br compression, which flask doesn't understand
  • allow all methods on proxy route so Kibana/Elasticsearch can decide what to do with them
  • allow unauthenticated access to one weird path that browsers don't send cookies to somehow?????
  • rename session cookie
  • configure cf url

Security considerations

• There is some risk in this image - it has hard-coded passwords, but the image is made only for testing and its name (hopefully) makes that clear
• The bypassed path is just favicons, but it feels really weird that it doesn't send cookies
• Allowing all methods is kind of scary, but we're just proxying them, and it's required because Kibana actually makes use of some/all of the verbs

[apburnes]

I like the setup and super easy to get going. I wasn't able to pass all the tests locally but there maybe some env variable I am missing. test_app_filters_headers (AssertionError: assert 'x-proxy-user' != 'x-proxy-user') and test_session_refreshes (KeyError: 'session') in tests/unit/test_app.py.

[bengerman13]

I wasn't able to pass all the tests locally but there maybe some env variable I am missing. test_app_filters_headers (AssertionError: assert 'x-proxy-user' != 'x-proxy-user') and test_session_refreshes (KeyError: 'session') in tests/unit/test_app.py.

there's a very good explanation for that:
I broke the tests