* add specific docker network to allow gateway and subnet configuration
  * add separate location for pgAdmin in dev mode
  * add docker container names attribute in addition to service name
  * add websocket config to nginx.conf from nginx.raw
  * make network-name configurable

Signed-off-by: Daniel Einars <contact@dle.dev>

moved entrypoints into images, moved context into separate folders, mounting entrypoints only in dev