Its a good article - can I suggest using the Github gist method to embed your code samples? Its a bit nicer than using screenshots: https://medium.com/@vegetablecode/6-ways-to-embed-source-code-in-medium-articles-a0b2f0ce24c7

Also - it'd be super helpful to include some tips on initialising the PostGRESql database, by showing a sample initialisation script. It took me a bit of hacking to work out mine here:

https://github.com/Smithsoft/PRAC/blob/main/docker_postgres_init.sql

I'm used to MySQL and didn't realise that \c was needed for "connect", instead of the MySQL "use" statement.