Jonas Kaninda
36 lines
990 B
Docker
36 lines
990 B
Docker
# syntax=docker/dockerfile:1
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FROM golang:1.26-alpine AS build
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WORKDIR /src
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# Version baked into the binary. Build each canary image with e.g.
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# docker build --build-arg VERSION=1.0.0 -t guestbook:1.0.0 .
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# docker build --build-arg VERSION=2.0.0 -t guestbook:2.0.0 .
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ARG VERSION=dev
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# Cache module downloads.
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COPY go.mod go.sum ./
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RUN go mod download
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# Build a static binary (the web UI is embedded via go:embed, so no assets to copy).
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COPY . .
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RUN CGO_ENABLED=0 go build -trimpath \
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-ldflags="-s -w -X main.version=${VERSION}" -o /out/guestbook .
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RUN mkdir -p /data
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FROM gcr.io/distroless/static-debian12:nonroot
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WORKDIR /app
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COPY --from=build /out/guestbook /app/guestbook
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# Writable /data volume for the SQLite database, owned by the non-root user.
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COPY --from=build --chown=nonroot:nonroot /data /data
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VOLUME ["/data"]
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ENV PORT=8080 \
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DB_PATH=/data/guestbook.db
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EXPOSE 8080
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# Runs as the non-root user provided by the distroless image.
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ENTRYPOINT ["/app/guestbook"]
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