Allow for starting just some of the containers. This will be needed for
implementing postgres::import where we'll need to stop all containers
and then only start postgres container.
Implemented basic wanted functionality for docker compose subcommands.
We currently assume that docker-compose.yaml file is located in
local/docker/ folder.
Made initial command scopes
d -> docker related commands
dc -> docker compose related commands
dj -> django related commands
pg -> postgres related commands