* fn: docker compose fixups
1) FN_DOCKER_NETWORKS for fnserver to place the functions in
2) mysql should be in sync with test.sh/api_test.sh mysql version to avoid errors such as
msg="couldn't ping db" error="this authentication plugin is not supported" url="root:root@tcp(db:3306)/funcs
TODO: fix/investigate why fnserver fails on latest mysql.
* fn: docker-compose network should be explicit
* Docker compose file for simpler dev env
* Updating readme, adding UI to compose
* Define dependencies between services
* Prometheus. Grafana
* Link Prometheus to Grafana service
* Addressing review comments
* Linking compose doc to common table of content