ci image dockerfile

docker/ci.dockerfile

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+FROM ubuntu:20.04
+
+ENV DEBIAN_FRONTEND=noninteractive
+SHELL [ "/bin/bash", "-euxo", "pipefail", "-c" ]
+
+VOLUME /repo
+WORKDIR /repo
+
+# Install dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends gnupg git curl pipx npm python3.8 python3-pip python3.8-venv shellcheck yamllint debian-keyring debian-archive-keyring apt-transport-https
+
+RUN curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
+RUN curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | tee /etc/apt/sources.list.d/caddy-stable.list
+RUN apt-get update
+RUN apt install -y --no-install-recommends caddy
+
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.0/install.sh | bash
+
+RUN pipx install ansible-core --force && pipx ensurepath --force
+
+RUN pip install ruff
+
+RUN rm -rf /var/lib/apt/lists/*
+
+ENTRYPOINT [ "/bin/bash", "-euxo", "pipefail" ]