Distill to single Dockerfile

.github/workflows/docker.yml

@@ -0,0 +1,12 @@
+name: Docker Build
+on: [push]
+
+jobs:
+  docker-build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Build Docker images
+      run: hooks/build
+      env:
+        DOCKER_BUILDKIT: '1'

Dockerfile

@@ -0,0 +1,77 @@
+FROM golang:1.13.3-alpine as builder
+
+WORKDIR /src
+
+RUN apk add --no-cache \
+    git \
+    ca-certificates
+
+ARG CADDY_SOURCE_VERSION=v2
+
+RUN git clone -b $CADDY_SOURCE_VERSION https://github.com/caddyserver/caddy.git --depth 1
+
+WORKDIR /src/caddy/cmd/caddy
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -trimpath -tags netgo -ldflags '-extldflags "-static" -s -w' -o /usr/bin/caddy
+
+# Fetch the latest default welcome page and default Caddy config
+FROM alpine:3.10.3 AS fetch-assets
+
+RUN apk add --no-cache git
+
+ARG DIST_COMMIT=97bcdfccf5392c650216ebb0634a5ed4c680ad6a
+
+WORKDIR /src/dist
+RUN git clone https://github.com/caddyserver/dist .
+RUN git checkout $DIST_COMMIT
+
+RUN cp config/Caddyfile /Caddyfile
+RUN cp welcome/index.html /index.html
+
+FROM alpine:3.10.3 AS alpine
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs
+COPY --from=builder /etc/passwd /etc/passwd
+
+COPY --from=fetch-assets /Caddyfile /etc/caddy/Caddyfile
+COPY --from=fetch-assets /index.html /usr/share/caddy/index.html
+
+ARG VCS_REF
+ARG VERSION
+LABEL org.opencontainers.image.revision=$VCS_REF
+LABEL org.opencontainers.image.version=$VERSION
+LABEL org.opencontainers.image.title=Caddy
+LABEL org.opencontainers.image.description="a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go"
+LABEL org.opencontainers.image.url=https://caddyserver.com
+LABEL org.opencontainers.image.documentation=https://github.com/caddyserver/caddy/wiki/v2:-Documentation
+LABEL org.opencontainers.image.vendor="Light Code Labs"
+LABEL org.opencontainers.image.licenses=Apache-2.0
+LABEL org.opencontainers.image.source="https://github.com/caddyserver/caddy-docker"
+
+CMD [ "caddy", "run", "--config", "/etc/caddy/Caddyfile", "--adapter", "caddyfile" ]
+
+FROM scratch AS scratch
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs
+COPY --from=builder /etc/passwd /etc/passwd
+
+COPY --from=fetch-assets /Caddyfile /etc/caddy/Caddyfile
+COPY --from=fetch-assets /index.html /usr/share/caddy/index.html
+
+ARG VCS_REF
+ARG VERSION
+LABEL org.opencontainers.image.revision=$VCS_REF
+LABEL org.opencontainers.image.version=$VERSION
+LABEL org.opencontainers.image.title=Caddy
+LABEL org.opencontainers.image.description="a powerful, enterprise-ready, open source web server with automatic HTTPS written in Go"
+LABEL org.opencontainers.image.url=https://caddyserver.com
+LABEL org.opencontainers.image.documentation=https://github.com/caddyserver/caddy/wiki/v2:-Documentation
+LABEL org.opencontainers.image.vendor="Light Code Labs"
+LABEL org.opencontainers.image.licenses=Apache-2.0
+LABEL org.opencontainers.image.source="https://github.com/caddyserver/caddy-docker"
+
+ENTRYPOINT [ "caddy" ]
+CMD [ "run", "--config", "/etc/caddy/Caddyfile", "--adapter", "caddyfile" ]