# syntax=docker/dockerfile:1.7

# Build stage — produces the static SPA bundle in /app/build.
FROM node:24-alpine AS builder

WORKDIR /app

COPY package.json package-lock.json ./
RUN --mount=type=cache,target=/root/.npm npm ci

COPY . .
RUN npm run build

# Runtime stage — a minimal Caddy that serves the SPA and falls back to
# index.html for client-side routing. The main reverse-proxy Caddy in
# the compose stack proxies `/` to this container.
FROM caddy:2-alpine AS runtime

WORKDIR /srv

COPY --from=builder /app/build /srv

RUN printf ':80 {\n\troot * /srv\n\ttry_files {path} /index.html\n\tfile_server\n\tencode zstd gzip\n\tlog {\n\t\toutput stdout\n\t\tformat console\n\t}\n}\n' > /etc/caddy/Caddyfile

EXPOSE 80

HEALTHCHECK --interval=10s --timeout=2s --retries=3 \
	CMD wget -qO- http://127.0.0.1/ >/dev/null 2>&1 || exit 1