add docker file

dockerfile

@@ -0,0 +1,13 @@
+# Build stage
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+RUN node --max-old-space-size=2048 ./node_modules/.bin/ng build --configuration production
+
+# Serve stage
+FROM nginx:alpine
+COPY --from=builder /app/dist/test /usr/share/nginx/html
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]