* backend: makes mongo auth configurable!
use mongo_auth secret in k8s and set env vars in docker
fixes#177
* docker: update config.sample.env: use ws screencast by default, add NO_DELETE_ON_FAIL option, extend default login lifetime
- set WEB_CONCURRENCY env var to configure number of backend api workers for both docker and k8s
- set via 'backend_workers' in values.yaml
- also add 'rwp_base_url' to values.yaml
- update containers to use public webrecorder/browsertrix-backend and webrecorder/browsertrix-frontend containers
- make liveness, readiness and startup health checks more tolerant
* frontend docker build: pass GIT_COMMIT_HASH and GIT_BRANCH_NAME as env vars to remove dependency on git in webpack.config.js (for glitchtip)
fixes#150
* default to "unknown" if git and env vars not available
* add comment about error reporting for local use
Co-authored-by: sua yoo <sua@suayoo.com>
