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Extract lint into a dedicated stage using the pre-built golangci/golangci-lint:v2.10.1-alpine image instead of downloading the binary manually with curl/sha256. This eliminates the slow multi-arch download+verify step and leverages Docker layer caching. Structure: - Lint stage: runs make fmt-check + make lint (with CGO deps for type-checking govips imports) - Build stage: depends on lint via COPY --from=lint, runs make test + builds the binary - Runtime stage: unchanged All images pinned by sha256 with version+date comments. Closes #18
79 lines
1.9 KiB
Docker
79 lines
1.9 KiB
Docker
# Lint stage
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# golangci/golangci-lint:v2.10.1-alpine, 2026-02-17
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FROM golangci/golangci-lint:v2.10.1-alpine@sha256:33bc6b6156d4c7da87175f187090019769903d04dd408833b83083ed214b0ddf AS lint
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RUN apk add --no-cache make build-base vips-dev libheif-dev pkgconfig
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WORKDIR /src
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# Copy go mod files first for better layer caching
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COPY go.mod go.sum ./
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RUN go mod download
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# Copy source code
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COPY . .
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# Run formatting check and linter
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RUN make fmt-check
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RUN make lint
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# Build stage
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# golang:1.25.4-alpine, 2026-02-25
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FROM golang:1.25.4-alpine@sha256:d3f0cf7723f3429e3f9ed846243970b20a2de7bae6a5b66fc5914e228d831bbb AS builder
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# Depend on lint stage passing
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COPY --from=lint /src/go.sum /dev/null
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ARG VERSION=dev
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# Install build dependencies for CGO image libraries
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RUN apk add --no-cache \
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build-base \
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vips-dev \
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libheif-dev \
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pkgconfig
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WORKDIR /src
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# Copy go mod files first for better layer caching
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COPY go.mod go.sum ./
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RUN GOTOOLCHAIN=auto go mod download
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# Copy source code
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COPY . .
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# Run tests
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RUN make test
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# Build with CGO enabled
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RUN CGO_ENABLED=1 GOTOOLCHAIN=auto go build -ldflags "-X main.Version=${VERSION}" -o /pixad ./cmd/pixad
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# Runtime stage
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# alpine:3.21, 2026-02-25
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FROM alpine:3.21@sha256:c3f8e73fdb79deaebaa2037150150191b9dcbfba68b4a46d70103204c53f4709
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# Install runtime dependencies only
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RUN apk add --no-cache \
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vips \
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libheif \
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ca-certificates \
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tzdata
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# Copy binary from builder
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COPY --from=builder /pixad /usr/local/bin/pixad
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# Create non-root user, config directory, and data directory
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RUN adduser -D -H -s /sbin/nologin pixad && \
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mkdir -p /var/lib/pixa /etc/pixa && \
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chown pixad:pixad /var/lib/pixa
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# Copy default config (edit signing_key before use)
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COPY config.example.yml /etc/pixa/config.yml
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USER pixad
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WORKDIR /var/lib/pixa
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EXPOSE 8080
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ENTRYPOINT ["/usr/local/bin/pixad", "--config", "/etc/pixa/config.yml"]
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