Course wont load

Here i am again posting about how someting in this tutoria l doesn’t work. i took the advice of running the tutorials locally rather than use the web which has now turned into a major headache. Basically I loaded my container and i started code alley btut i get this qhite screen that says OOPS, select an empty VSCode workspace, eventually i get to a point where i can open the tutorial but wheh i try to connect i get this message

    Is the server running locally and accepting
    connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

i have no idea how to fix this and in reading the thread others have had this issue. so… ho do i fix this?