Add root docker-compose and webapp Dockerfile/nginx for full-stack deployment

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

webapp/Dockerfile

@@ -0,0 +1,11 @@
+FROM node:22-alpine AS builder
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+EXPOSE 80

webapp/nginx.conf

@@ -0,0 +1,28 @@
+server {
+    listen 80;
+
+    # API und Auth-Endpunkte zum Backend proxieren
+    location /v1/ {
+        proxy_pass http://api:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
+    location /login {
+        proxy_pass http://api:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
+    location /logout {
+        proxy_pass http://api:8080;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
+    # SPA: alle anderen Routen auf index.html
+    location / {
+        root /usr/share/nginx/html;
+        try_files $uri $uri/ /index.html;
+    }
+}