Rene Nochebuena
fa04364413
Makefile:
- dry-run target (default) shows registry, branch, SHA, version, all computed
image tags, and build args — no side effects
- build/push/release targets wire docker build and docker push
- Branch-aware tag strategy:
main → <version> + latest
develop → <version>-dev-<short-sha>
release/* → <version>-qa-<short-sha>
- Version resolved from the highest semver tag at HEAD; falls back to the most
recent reachable tag via git describe
- BASE_DIGEST resolved at build time from the local Docker daemon; dry-run
prints a hint when the base image is not yet pulled
- Note: case/esac cannot be used inside $(shell) — Make's parser matches the
pattern ")" as the function's closing paren before the shell sees it;
if/elif/else/fi used instead
Dockerfile:
- OCI standard labels added to the final stage via build args (VERSION, GIT_SHA,
BASE_DIGEST):
org.opencontainers.image.source — repo URL
org.opencontainers.image.version — semver tag
org.opencontainers.image.revision — git commit SHA
org.opencontainers.image.base.name — alpine:3.21
org.opencontainers.image.base.digest — digest of base image at build time
- Custom label:
dev.nochebuena.healthz — /health
32 lines
863 B
Docker
32 lines
863 B
Docker
FROM golang:1.26-alpine AS builder
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WORKDIR /app
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COPY go.mod go.sum ./
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RUN go mod download
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COPY . .
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ARG VERSION=dev
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RUN CGO_ENABLED=0 GOOS=linux go build \
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-ldflags="-s -w" \
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-o spa-server \
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./cmd/spa-server
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FROM alpine:3.21
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RUN apk add --no-cache ca-certificates tzdata
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WORKDIR /app
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COPY --from=builder /app/spa-server .
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ARG VERSION=dev
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ARG GIT_SHA=unknown
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ARG BASE_DIGEST=
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LABEL org.opencontainers.image.source="https://code.nochebuena.dev/einherjar/spa-server"
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LABEL org.opencontainers.image.version="$VERSION"
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LABEL org.opencontainers.image.revision="$GIT_SHA"
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LABEL org.opencontainers.image.base.name="alpine:3.21"
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LABEL org.opencontainers.image.base.digest="$BASE_DIGEST"
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LABEL dev.nochebuena.healthz="/health"
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# Mount your SPA dist/ here, or COPY it in a downstream Dockerfile.
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VOLUME ["/srv/www"]
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EXPOSE 8080
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ENTRYPOINT ["/app/spa-server"]
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