36 lines
1.1 KiB
Docker
36 lines
1.1 KiB
Docker
# syntax=docker/dockerfile:1
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# --- build stage: compile a static, CGO-free binary ---
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FROM golang:1.26-alpine AS build
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ARG COVER_DIR=/covers
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WORKDIR /src
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# Dependencies first for layer caching (changes rarely).
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COPY go.mod go.sum ./
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RUN go mod download
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# Then source (changes often). internal/web carries the go:embed'd
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# templates/static assets — missing them turns the embed directive into a
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# build error, so the whole tree must land before `go build`.
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COPY *.go ./
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COPY internal/ ./internal/
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# Static binary: the Postgres driver (jackc/pgx) is pure Go, so CGO_ENABLED=0
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# leaves no libc dependency.
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# -trimpath + -ldflags strip paths and debug info for a smaller image.
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RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -ldflags="-s -w" -o /out/server .
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# Create the source directory; runtime COPY sets ownership for the named volume.
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RUN mkdir -p "$COVER_DIR"
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# --- runtime stage: distroless static, non-root ---
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FROM gcr.io/distroless/static:nonroot
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ARG COVER_DIR=/covers
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WORKDIR /
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COPY --from=build --chown=65532:65532 ${COVER_DIR} ${COVER_DIR}
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COPY --from=build /out/server /server
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EXPOSE 8080
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USER nonroot:nonroot
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ENV PORT=8080
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ENTRYPOINT ["/server"]
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