update dockerfile

dockerfile

@@ -1,15 +1,45 @@
-FROM node:14 as build
-WORKDIR /app
-COPY ./package*.json /app/
-RUN npm config set unsafe-perm true
-RUN npm install -g ionic
-RUN npm config set legacy-peer-deps true
-RUN npm i -D typescript@4.3.5
-RUN npm install --save --legacy-peer-deps
-COPY ./ /app/
-RUN ionic build --prod
+# =========================
+# BUILD STAGE
+# =========================
+FROM node:16 AS build
 
-FROM nginx:latest
+WORKDIR /app
+
+# Avoid npm randomness
+ENV NPM_CONFIG_LEGACY_PEER_DEPS=true
+ENV NPM_CONFIG_AUDIT=false
+ENV NPM_CONFIG_FUND=false
+
+# Copy dependency files first (better caching)
+COPY package*.json ./
+
+# Clean install (IMPORTANT: single install only)
+RUN npm cache clean --force
+RUN npm install --legacy-peer-deps --no-audit --no-fund
+
+# Copy full project
+COPY . .
+
+# Build Ionic Angular app
+RUN npx ionic build --configuration production
+
+
+# =========================
+# PRODUCTION STAGE (NGINX)
+# =========================
+FROM nginx:alpine
+
+# Nginx config (optional but recommended for SPA routing)
 COPY ./nginx/default.conf /etc/nginx/conf.d/default.conf
+
+# Clean default nginx files
 RUN rm -rf /usr/share/nginx/html/*
-COPY /www/ /usr/share/nginx/html/
+
+# Copy build output from previous stage
+COPY --from=build /app/www /usr/share/nginx/html
+
+# Expose port
+EXPOSE 80
+
+# Start nginx
+CMD ["nginx", "-g", "daemon off;"]