refactor: divide into two stages

frontend/Dockerfile

@@ -1,14 +1,27 @@
+# FIRST STAGE
 # Define the base image
-FROM node:alpine
+FROM node:20.12.2 as build
 
-# Create a folder and copy the folder structure from local
+# Create a folder, and copy package.json and package-lock.json to it
 WORKDIR /app
-COPY . /app
+COPY package*.json ./
 
 # Install dependencies
-RUN npm install -g @angular/cli
 RUN npm install
 
-EXPOSE 4200
+# Install Angular
+RUN npm install -g @angular/cli
+
+# Copy all the files in the current directory to the container
+COPY . ./
+
+# Build the Angular application
+RUN ng build --configuration=production
+
+# SECOND STAGE
+# Define the base image
+FROM nginx:latest
+
+COPY --from=build app/dist/aftas-angular /usr/share/nginx/html
 
-CMD ["ng", "serve", "--host", "0.0.0.0", "--port", "4200"]
+EXPOSE 80