Docker build incompatible with current docker compose

In the Docker image we have the app now living in /app, but we also have the installed modules in /app/local. This seems to cause conflicts with mounting a local metacpan-web in /app as it immediately throws:

web-1 | Error while loading /app/app.psgi: Can't locate Config/ZOMG.pm in @INC (you may need to install the Config::ZOMG module) (@INC contains: /app/local/lib/perl5 /usr/local/lib/perl5/site_perl/5.36.3/x86_64-linux-gnu /usr/local/lib/perl5/site_perl/5.36.3 /usr/local/lib/perl5/vendor_perl/5.36.3 /x86_64-linux-gnu /usr/local/lib/perl5/vendor_perl/5.36.3 /usr/local/lib/perl5/5.36.3/x86_64-linux-gnu /usr/local/lib/perl5/5.36.3) at /app/app.psgi line 11. web-1 | BEGIN failed--compilation aborted at /app/app.psgi line 11. web-1 | unable to find PSGI function entry point. web-1 | no app loaded. GAME OVER

This was not obvious until now because the docker-compose config is set up as:

      - type: bind
        source: ./src/metacpan-web
        target: /metacpan-web

which means that with the current setup, changes to the local env won't be reflected in the running Docker container.

metacpan / metacpan-web

Docker build incompatible with current docker compose #3196