Implemented custom command builder with nicer api suited for my needs.
Also returned error if there are no containers in
`scripts::postgres::get_containers`.
Implemented basic wanted functionality for postgres subcommands. We
currently assume that postgres is running in docker-compose project in a
service named "postgresdb". This could be looked at and changed at some
point in the future.
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