Preparing file structure for multi service build and host.

web-app/Dockerfile

@@ -0,0 +1,22 @@
+# web-app/Dockerfile
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Copy package files first to leverage Docker's build cache
+COPY package*.json ./
+
+# Install all dependencies needed for the build
+RUN npm install
+
+# Copy the rest of your application code
+COPY . .
+
+# Run the build script to compile the React frontend
+RUN npm run build
+
+# Expose the port your server will listen on
+EXPOSE 3000
+
+# The command to start your production server
+CMD ["npm", "run", "host"]