fix

Dockerfile

@@ -1,17 +1,39 @@
-FROM node:18-alpine
-
+# ---- deps ----
+FROM node:18-alpine AS deps
 WORKDIR /app
-
 COPY package*.json ./
+# Für reproduzierbare Builds: CI bevorzugt
+RUN npm ci
 
-RUN npm install
-
+# ---- builder ----
+FROM node:18-alpine AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
 COPY . .
-
+ENV NODE_ENV=production
+# Falls du Prisma o.ä. verwendest, optional vor dem Build:
+# RUN npx prisma generate
 RUN npm run build
 
+# ---- runner (Variante A: Standard "npm start") ----
+# Nutze diese Runner-Stufe, wenn du KEIN 'output: standalone' hast:
+FROM node:18-alpine AS runner
+WORKDIR /app
 ENV NODE_ENV=production
-
+ENV PORT=3000
+COPY --from=builder /app ./
 EXPOSE 3000
+CMD ["npm", "start"]
 
-CMD ["npm", "start"]
+# ---- runner-standalone (Variante B: Next.js Standalone) ----
+# Wenn du in next.config.js 'output: "standalone"' gesetzt hast, 
+# kannst du stattdessen diese Runner-Stufe verwenden und die obere auskommentieren:
+# FROM node:18-alpine AS runner
+# WORKDIR /app
+# ENV NODE_ENV=production
+# ENV PORT=3000
+# COPY --from=builder /app/.next/standalone ./
+# COPY --from=builder /app/.next/static ./.next/static
+# COPY --from=builder /app/public ./public
+# EXPOSE 3000
+# CMD ["node", "server.js"]