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docker: slim build by excluding .git and non-essential files

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Replace the in-Dockerfile `git rev-parse HEAD` with a GIT_HASH build arg
passed from docker-compose (local) or github.sha (CI), defaulting to
"unknown" when unset.

Also exclude .github/, docs/, tests/, and *.md (except www/**/*.md).
This commit is contained in:
j4n
2026-02-17 08:05:57 +01:00
parent c22efeb74b
commit 425e3db07a
4 changed files with 20 additions and 2 deletions
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8
docker/chatmail_relay.dockerfile
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@@ -62,8 +62,12 @@ RUN cp -a www/ /opt/chatmail-www/
RUN rm -f /tmp/chatmail.ini
# Record image version for upgrade detection at runtime
RUN git rev-parse HEAD > /etc/chatmail-image-version 2>/dev/null || echo "unknown" > /etc/chatmail-image-version
# Record image version for upgrade detection at runtime.
# GIT_HASH is passed as a build arg (from docker-compose or CI) so that
# .git/ can be excluded from the build context via .dockerignore.
ARG GIT_HASH=unknown
RUN echo "$GIT_HASH" > /etc/chatmail-image-version && \
echo "$GIT_HASH" > /etc/chatmail-version
# --- End build-time install ---
ENV CHATMAIL_INI=/etc/chatmail/chatmail.ini