# Build-only image for the Vue frontend.
# It is never run as a service: ansible builds this image once, runs it
# with the host output directory bind-mounted at /output, the container
# copies the compiled static build into it, and exits. Nginx on the host
# then serves that directory directly.

FROM node:20-alpine AS build
WORKDIR /app

# The build context here is just frontend/ (no .git), so vite.config.js's
# own `git rev-parse` fallback can't find a repo - the actual commit is
# passed in from the real checkout via this build-arg instead (see
# playbook.yml).
ARG GIT_COMMIT=unknown
ENV GIT_COMMIT=$GIT_COMMIT

COPY package.json package-lock.json ./
COPY extras/ ./extras/
RUN npm ci
COPY . .
RUN npm run build

FROM alpine AS export
COPY --from=build /app/dist /dist
VOLUME /output
CMD ["sh", "-c", "rm -rf /output/* && cp -a /dist/. /output/"]
