Experiment

docker/Dockerfile.multistage

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+FROM golang:1.23-alpine AS gobuild
+
+WORKDIR /go/src/github.com/gimlet-io/capacitor
+
+COPY . .
+
+RUN mkdir -p bin
+RUN GOOS=linux GOARCH=amd64 go build -a -installsuffix cgo -o bin/linux/amd64/capacitor github.com/gimlet-io/capacitor/cmd/capacitor
+
+FROM node:22-alpine AS npmbuild
+
+WORKDIR /src
+
+COPY web .
+
+RUN npm ci
+RUN npm run build
+
+FROM --platform=$TARGETPLATFORM alpine:3
+
+RUN addgroup -S capacitor && adduser -S capacitor -G capacitor
+
+ADD docker/known_hosts /etc/ssh/ssh_known_hosts
+
+RUN mkdir /var/lib/capacitor
+RUN chown capacitor:capacitor /var/lib/capacitor
+WORKDIR /capacitor
+
+ARG TARGETPLATFORM
+ARG BUILDPLATFORM
+
+COPY --from=gobuild --chown=capacitor:capacitor /go/src/github.com/gimlet-io/capacitor/bin/linux/amd64/capacitor capacitor
+COPY --from=npmbuild --chown=capacitor:capacitor /src/build ./web/build/
+
+USER capacitor
+
+EXPOSE 9000
+CMD ["/capacitor/capacitor"]