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compscidr merged 2 commits into from
Oct 17, 2026
Merged

Multi-stage Docker build: 1.65 GB -> 152 MB #686

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Multi-stage Docker build: 1.65 GB -> 152 MB
compscidr Oct 17, 2026
b9f288f
Dockerfile: only the SQLite driver needs cgo
compscidr Oct 17, 2026
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27 changes: 18 additions & 9 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,20 +1,29 @@
# Start from a Debian image with the latest version of Go installed
# and a workspace (GOPATH) configured at /go.
FROM golang:1.26.1
# Build stage: the Go toolchain is only needed to compile. cgo is on
# (the SQLite driver, mattn/go-sqlite3, needs it), so the runtime base
# below must be the same Debian release, for a matching glibc.
FROM golang:1.26.1-trixie AS build

# Copy the local package files to the container's workspace.
ADD . /go/src/github.com/compscidr/goblog/

# Build the outyet command inside the container.
# (You may fetch or manage dependencies here,
# either manually or with a tool like "godep".)
ARG VERSION
RUN cd /go/src/github.com/compscidr/goblog/ && go build -ldflags="-X 'main.Version=$VERSION'" -v .

# Run the outyet command by default when the container starts.
# So `docker exec <container> ./goblog reset-admin-password` finds .env.
FROM debian:trixie-slim

# ca-certificates: outgoing HTTPS (OAuth, the plugin directory, SMTP over TLS).
RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates \
&& rm -rf /var/lib/apt/lists/*

# Same path as before, so existing bind mounts still line up, and
# `docker exec <container> ./goblog reset-admin-password` finds .env.
WORKDIR /go/src/github.com/compscidr/goblog

# The binary plus what it reads from the working directory at runtime.
COPY --from=build /go/src/github.com/compscidr/goblog/goblog ./
COPY www ./www
COPY themes ./themes
COPY templates ./templates

ENTRYPOINT cd /go/src/github.com/compscidr/goblog && ./goblog

# Document that the service listens on port 7000.
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