Docker: Runtime-Config via window.__RMM_CONFIG__ (kein Rebuild bei Backend-Wechsel)

- Dockerfile: multistage build (node -> nginx)
- docker-entrypoint.sh: injiziert BACKEND_HOST/PORT zur Laufzeit
- nginx.conf: SPA-Routing, config.js no-cache
- index.html: laedt /config.js vor dem React-Bundle

Usage: docker run -e BACKEND_HOST=rmm.example.com -e BACKEND_PORT=8443 -p 80:80 rmm-frontend

frontend/Dockerfile

@@ -0,0 +1,23 @@
+# Stage 1: Build
+FROM node:22-alpine AS builder
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+# Stage 2: Serve
+FROM nginx:alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker-entrypoint.sh /docker-entrypoint.sh
+RUN chmod +x /docker-entrypoint.sh
+
+# Runtime-Konfiguration via Umgebungsvariablen
+# BACKEND_HOST, BACKEND_PORT werden in window.__RMM_CONFIG__ injiziert
+ENV BACKEND_HOST=localhost
+ENV BACKEND_PORT=8443
+
+EXPOSE 80
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["nginx", "-g", "daemon off;"]