Yep, works

Dockerfile

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+FROM alpine AS base
+RUN apk --no-cache add \
+  build-base \
+  hugo \
+  rsync \
+  openssh-client \
+  python3 \
+  curl \
+  ca-certificates \
+  git
+RUN curl -L https://go.dev/dl/go1.21.3.linux-armv6l.tar.gz | gunzip | tar x -C /opt -f -
+RUN ln -s /opt/go/bin/* /usr/local/bin/
+
+
+FROM base AS runner-build
+WORKDIR /src
+RUN git clone https://gitea.com/gitea/act_runner
+RUN CGO_ENABLED=0 make -C act_runner build
+
+FROM base
+COPY --from=runner-build /src/act_runner/act_runner /usr/local/bin
+COPY entrypoint.sh /
+RUN adduser -D builder
+USER builder
+WORKDIR /app
+ENTRYPOINT [ "/entrypoint.sh" ]

LICENSE.md

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+MIT License
+
+Copyright © 2023 Neale Pickett
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+* The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+The software is provided "as is", without warranty of any kind, express or
+implied, including but not limited to the warranties of merchantability,
+fitness for a particular purpose and noninfringement. In no event shall the
+authors or copyright holders be liable for any claim, damages or other
+liability, whether in an action of contract, tort or otherwise, arising from,
+out of or in connection with the software or the use or other dealings in the
+software.

README.md

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+Big Builder
+===========
+
+I personally don't want to be running CI/CD automation
+with full access to my Docker socket.
+
+I made this image to hold all my typical build toolset,
+and also the gitea runner,
+so now I can just say `runs-on: big-builder`,
+and stuff works without docker.
+
+This does mean I can't use github actions.
+That's okay with me:
+I don't want to be running node on my Raspberry Pi, either.
+I know how to use the Bourne shell,
+so I'm able to do everything I want that way.
+
+
+How To Set This Up
+------------------
+
+This wants its files to live in `/app`.
+After you do the registration step,
+that can be mounted read-only.
+But it will want to write its token in the registration step.
+
+You should provide custom tags:
+that's how you keep it from trying to use docker.
+On my raspberry pi,
+I used `["big-builder", "aarch64", "go", "python3", "hugo"]`.
+
+Otherwise, just set this up the same way you would set up the
+[gitea act runner](https://docs.gitea.com/usage/actions/act-runner).
+
+To run in daemon mode,
+you have to give it `daemon` on the commandline:
+I didn't make a fancypants script to guess the command.
+
+
+Adding Other Packages
+---------------------
+
+Make your own image. Like so:
+
+```Dockerfile
+FROM big-builder
+RUN apk --no-cache add nethack
+``
+
+Even better, steal this one's Dockerfile and add stuff to it.
+You shouldn't trust my image to be malware-free.
+
+
+Caveats
+-------
+
+Right now (October 2023),
+if anything tries to read from the tty,
+the runner just sits there forever.
+This is a problem with the runner that they might fix one day.
+Just something to bear in mind:
+I spent a bit of time chasing this one down.

entrypoint.sh

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+#! /bin/sh
+
+exec </dev/null
+exec /usr/local/bin/act_runner "$@"