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build: multi-stage Dockerfile with node->go->slim for embedded SPA

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Web assets are built in the node stage, copied into the go stage before
go build so //go:embed picks them up, then the minimal slim runtime
carries only the final binary and ffmpeg.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Bryan Van Deusen
2026-04-22 12:58:29 -04:00
parent 75ce65c80e
commit d9f55df347
1 changed files with 9 additions and 0 deletions
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Dockerfile
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@@ -1,10 +1,19 @@
# syntax=docker/dockerfile:1.6 # syntax=docker/dockerfile:1.6
FROM node:22-bookworm-slim AS web
WORKDIR /web
COPY web/package.json web/package-lock.json ./
RUN npm ci
COPY web/ ./
RUN npm run build
FROM golang:1.23-bookworm AS builder FROM golang:1.23-bookworm AS builder
WORKDIR /src WORKDIR /src
COPY go.mod go.sum ./ COPY go.mod go.sum ./
RUN go mod download RUN go mod download
COPY . . COPY . .
# Overwrite the committed placeholder with the freshly-built SPA assets.
COPY --from=web /web/build ./web/build
ENV CGO_ENABLED=0 ENV CGO_ENABLED=0
RUN go build -trimpath -ldflags="-s -w" -o /out/minstrel ./cmd/minstrel RUN go build -trimpath -ldflags="-s -w" -o /out/minstrel ./cmd/minstrel