Optimize Dockerfile for production

- Copy `package.json` and `package-lock.json` to install only production dependencies.
- Use `npm ci --only=production` for faster and more reliable builds.

Dockerfile

@@ -10,6 +10,13 @@ FROM node:20-alpine AS production
 
 WORKDIR /app
 ENV NODE_ENV=production
+
+# Kopiere package.json und package-lock.json für Produktions-Abhängigkeiten
+COPY package*.json ./
+# Installiere nur Produktions-Abhängigkeiten
+RUN npm ci --only=production && npm cache clean --force
+
+# Kopiere das gebaute Projekt
 COPY --from=build /app/dist ./dist
 
 # install minimal deps to run node if needed (alpine already has node)