edit Dockerfile

Dockerfile

@@ -1,4 +1,3 @@
-# Stage 1: Build
 FROM node:18-alpine AS builder
 WORKDIR /app
 COPY package*.json ./
@@ -6,11 +5,10 @@ RUN npm install
 COPY . .
 RUN npm run build
 
-# Stage 2: Run
 FROM node:18-alpine
 WORKDIR /app
 COPY --from=builder /app ./
 EXPOSE 3000
 ENV PORT=3000
-CMD ["npx", "next", "start", "-p", "3000"]
+CMD ["sh", "-c", "npx next start -p ${PORT} -H 0.0.0.0"]