Chore: Update doc/release.rst

Release 0.4.3

Tests: Configure coverage details in `pyproject.toml`

Chore: Update uv lockfile `uv.lock`

OCI: Add configuration for {Docker,Podman} Compose

CLI: Make the CLI accept environment variables for configuration

Chore: README copy editing

Chore: Inline comments for `Dockerfile`s

Chore: Update change log

Chore: Code formatting

Chore: Rename application handle reference to `app`

OCI: Install `curl` for {Docker,Podman} Compose health checks

OCI/dev: Also install `git`, now required by `versioningit`

OCI: Don't configure CMD

OCI: Fix booting