add Dockerfile to run tests in

.dockerignore

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+.git

Dockerfile

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+FROM code.forgejo.org/oci/node:20-bookworm
+
+ENV PATH=$PATH:/setup-forgejo
+ENV _CONTAINERS_USERNS_CONFIGURED=""
+
+ADD https://code.forgejo.org/actions/setup-forgejo.git /setup-forgejo
+
+RUN apt-get update && \
+    apt-get --assume-yes --no-install-recommends install \
+        ca-certificates \
+        curl \
+        daemon \
+        git \
+        jq \
+        podman \
+        podman-docker \
+        procps \
+        slirp4netns \
+        sqlite3 \
+        sudo \
+        tcpdump \
+        uidmap \
+        wget && \
+    adduser forgejo-tests && \
+    groupadd wheel && \
+    adduser forgejo-tests wheel && \
+    echo "%wheel ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers && \
+    echo "forgejo-tests:10000:9999" > /etc/subuid && \
+    echo "forgejo-tests:10000:9999" > /etc/subgid && \
+    mkdir /srv/forgejo-binaries && \
+    chown forgejo-tests:forgejo-tests /srv/forgejo-binaries && \
+    apt-get clean
+
+COPY . /e2e
+
+USER forgejo-tests
+
+WORKDIR /e2e
+
+ENTRYPOINT /bin/bash