add pgAdmin service

[conscious-puppet]

resolves #80

Related issues

• pgadmin4 test suite fails on MacOS running aarch64 cpus NixOS/nixpkgs#281214

[conscious-puppet]

@srid @shivaraj-bh instead of fetching from cache, pgadmin4 is getting built on macos. i see a few errors in installCheckPhase and then it gets stuck in that phase. I have added an overlay in test/flake.nix to skip it. should i mention that in doc/pgadmin.md for mac?

[srid]

@conscious-puppet Looks like this package is known to fail:

❯ nix run github:nix-community/hydra-check -- pgadmin4 --arch aarch64-darwin
Build Status for pgadmin4.aarch64-darwin on jobset nixpkgs/trunk
✖ (Timed out) pgadmin-8.2 from 2024-02-28 - https://hydra.nixos.org/build/251343181

Last Builds:
✖ (Timed out) pgadmin-8.2 from 2024-02-25 - https://hydra.nixos.org/build/250917382
✖ (Dependency failed) pgadmin-8.2 from 2024-02-22 - https://hydra.nixos.org/build/250595307
✖ (Dependency failed) pgadmin-8.2 from 2024-02-22 - https://hydra.nixos.org/build/250593778
✖ (Dependency failed) pgadmin-8.2 from 2024-02-21 - https://hydra.nixos.org/build/250533764
✖ (Dependency failed) pgadmin-8.2 from 2024-02-19 - https://hydra.nixos.org/build/250328277
✖ (Dependency failed) pgadmin-8.2 from 2024-02-16 - https://hydra.nixos.org/build/249808942
✖ (Dependency failed) pgadmin-8.2 from 2024-02-15 - https://hydra.nixos.org/build/249731613
✖ (Dependency failed) pgadmin-8.2 from 2024-02-14 - https://hydra.nixos.org/build/249720474
✖ (Dependency failed) pgadmin-8.2 from 2024-02-13 - https://hydra.nixos.org/build/249622109

https://hydra.nixos.org/build/251343181

Last successful build was about a year ago.

Also: NixOS/nixpkgs#281214

[shivaraj-bh]

With this we can completely remove docker from NY: nammayatri/nammayatri#5174