Part of https://github.com/matrix-org/matrix-public-archive/issues/6
Follow-up to https://github.com/matrix-org/matrix-public-archive/pull/22
Containerize app (make a Docker image for `matrix-public-archive`) ``` ghcr.io/matrix-org/matrix-public-archive/matrix-public-archive ``` ... with a variety of tags! Packages viewable on https://github.com/matrix-org/matrix-public-archive/pkgs/container/matrix-public-archive%2Fmatrix-public-archive