flask and node.js solution

Dockerfile

@@ -1,26 +1,23 @@
-FROM python:3.11-slim
+# Use an official Node.js runtime as a parent image
+# Alpine Linux is chosen for its small size
+FROM node:20-alpine
 
-# Set working directory
+# Set the working directory in the container
 WORKDIR /app
 
-# Install system dependencies
-RUN apt-get update && apt-get install -y \
-    && rm -rf /var/lib/apt/lists/*
+# Copy package.json and package-lock.json (if available)
+COPY package*.json ./
 
-# Copy requirements file
-COPY requirements.txt .
+# Install app dependencies using npm ci for faster, reliable builds
+# Use --only=production to avoid installing devDependencies
+RUN npm ci --only=production
 
-# Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt
-
-# Copy application files
+# Copy the rest of the application code
 COPY . .
 
-# Generate VAPID keys if .env doesn't exist
-RUN if [ ! -f .env ]; then python generate_vapid_keys.py; fi
+# Make port 3000 available to the world outside this container
+# This is the port our Node.js app will listen on
+EXPOSE 3000
 
-# Expose the application port
-EXPOSE 8080
-
-# Command to run the application
-CMD ["python", "app.py"]
+# Define the command to run your app using CMD which defines your runtime
+CMD [ "node", "server.js" ]