- Minor updates to all Dockerfiles

- Move cabal to /usr/local/bin

- Revert back to LLVM v14 as backend
  - Use supported LLVM versions (even numbers) if possible
  - Only use unsupported LLVM version if forced by base image upgrade

- Use GHC 9.4.6 for bootstrapping
- Check Dockerfiles with hadolint. Ignored rules:
  - DL3003: Use WORKDIR to switch to a directory.
  - DL3018: Pin versions in apk add.

- Use GHC 9.4.5 for bootstrapping

- Use LLVM v14

- Use GHC 9.2.7 for bootstrapping

- Use GHC 9.2.6 for bootstrapping

- Update base image to alpine:3.17; Use LLVM v14

- Use GHC 9.2.5 for bootstrapping

- Build system: Migrate from make to Hadrian
- Install location: Migrate from /usr to /usr/local
- CMD instruction: Add ghci

- Fix .gitlab-ci.yml and latest Dockerfile

- Update latest Dockerfile

- Update base image to alpine:3.16

- Use GHC 9.0.2 for bootstrapping

- Use LLVM version 12 as backend

- Add patch for rts/RtsSymbols.c

- Use GHC 8.10.7 for bootstrapping

- Use GHC 8.10.6 for bootstrapping

- Use GHC 8.10.5 for bootstrapping
- Update GPG key server

- Update bootstrap images