Containerfile


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# git-forge: one binary, one data directory, one listener. Strictly Alpine,
# both stages, so there is one distribution to reason about.

FROM alpine:3.23 AS build
RUN apk add --no-cache go
WORKDIR /src
COPY go.mod go.sum ./
RUN go mod download
COPY . .
# Static, so the runtime image needs neither Go nor libc.
RUN CGO_ENABLED=0 go build -trimpath -ldflags "-s -w" -o /git-forge .

FROM alpine:3.23
# git-daemon is not the daemon here: in Alpine that subpackage is where
# git-http-backend lives, and without it every clone and push answers 500.
# tini reaps what git leaves: a detached gc is reparented to PID 1 and would
# otherwise stay a zombie.
RUN apk add --no-cache git git-daemon cgit highlight ca-certificates tini
COPY --from=build /git-forge /usr/local/bin/git-forge

# Non-root, and the datadir is credential material, so 0700 and one owner.
RUN adduser -D -H -u 1000 forge \
	&& install -d -o forge -g forge -m 0700 /var/lib/git-forge
USER forge
ENV HOME=/tmp

EXPOSE 8080
VOLUME /var/lib/git-forge
HEALTHCHECK --interval=30s --timeout=5s CMD wget -qO- http://127.0.0.1:8080/healthz || exit 1
ENTRYPOINT ["/sbin/tini", "--", "/usr/local/bin/git-forge"]