docs: update docker/readme #176

Job	Run time
build_and_push (default, ./docker/Dockerfile, linux/amd64,linux/arm64, jqtype/rpxy:latest ghcr.io...	4m 53s
build_and_push (default-pq, ./docker/Dockerfile, linux/amd64,linux/arm64, "CARGO_FEATURES=--no-de...	5m 1s
build_and_push (default-slim, ./docker/Dockerfile-slim, messense/rust-musl-cross:amd64-musl=docke...	4m 33s
build_and_push (default-slim-pq, ./docker/Dockerfile-slim, "CARGO_FEATURES=--no-default-features ...	4m 6s
build_and_push (s2n, ./docker/Dockerfile, "CARGO_FEATURES=--no-default-features --features=http3-...	5m 31s
build_and_push (s2n-pq, ./docker/Dockerfile, "CARGO_FEATURES=--no-default-features --features=htt...	5m 18s
build_and_push (webpki-roots, ./docker/Dockerfile, linux/amd64,linux/arm64, "CARGO_FEATURES=--no-...	4m 54s
build_and_push (slim-webpki-roots, ./docker/Dockerfile-slim, "CARGO_FEATURES=--no-default-feature...	6m 0s
build_and_push (s2n-webpki-roots, ./docker/Dockerfile, "CARGO_FEATURES=--no-default-features --fe...	5m 29s
dispatch_release_event	0s
	45m 45s

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