Having 2 different dev setups caused confusion, let's remove the Docker
local setup and recommend people install yarn locally.
Also simplified some docs by merging pages together, the recommend
self-hosting option is now the docker-compose / to adapt the
docker-compose.
* feat: merge front and server dockerfiles and optimize build
* fix: update image label
* fix: bring back support for REACT_APP_SERVER_BASE_URL injection at runtime
* fix: remove old entries & add nx cache in dockerignore
* feat: generate frontend config at runtime using Nest
* fix: format and filename
* feat: use the EnvironmentService and leave default blank
* feat: add support for DB migrations
