Install libpq-devel and copy to final image

Summary

libpq-devel is being installed in the builder, but is not being copied over properly to the final image. After inspecting the Dockerfile, it looks that way for other packages as well like sqlite.

Steps to reproduce

Tried to use the image, and it said libpq-devel was not installed. See pipeline build job https://code.il2.dso.mil/platform-one/devops/hello-pipeline/rails-world/-/jobs/1541416

LoadError: libpq.so.5: cannot open shared object file: No such file or directory - /builds/platform-one/devops/hello-pipeline/rails-world/vendor/bundle/ruby/2.7.0/gems/pg-1.2.3/lib/pg_ext.so

What is the current bug behavior?

(What actually happens)

What is the expected correct behavior?

(What you should see instead)

Relevant logs and/or screenshots

See pipeline build job https://code.il2.dso.mil/platform-one/devops/hello-pipeline/rails-world/-/jobs/1541416

LoadError: libpq.so.5: cannot open shared object file: No such file or directory - /builds/platform-one/devops/hello-pipeline/rails-world/vendor/bundle/ruby/2.7.0/gems/pg-1.2.3/lib/pg_ext.so

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)

Defintion of Done

• Bug has been identified and corrected within the container

/cc @ironbank-notifications/bug