Rene Nochebuena
bbc588d933
VOLUME ["/srv/www"] created an anonymous volume that docker compose reuses across container recreation, shadowing a freshly COPY'd SPA bundle with the previous build — up -d --build exited 0 while serving the old bundle (and poisoned the PWA service worker's ngsw.json). A child image cannot un-declare an inherited VOLUME, so it must not be declared: removing it makes the COPY case deterministic and leaves the runtime bind-mount case unaffected. Also refreshed the README FROM tag v1.0.0 -> v1.6.0.
37 lines
1.3 KiB
Docker
37 lines
1.3 KiB
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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# Provide your SPA build at /srv/www — COPY dist/ in a downstream Dockerfile, or
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# bind-mount it at runtime (-v /path/to/dist:/srv/www). No VOLUME is declared here
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# on purpose: a VOLUME at this path creates an anonymous volume that `docker compose
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# up` reuses across container recreation, shadowing a freshly COPY'd bundle with the
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# previous build — a silent stale deploy (worse for PWAs, whose service worker then
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# caches the stale ngsw.json). A runtime bind-mount works with or without it, and a
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# child image cannot un-declare an inherited VOLUME, so it must not be declared at all.
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EXPOSE 8080
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ENTRYPOINT ["/app/spa-server"]
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