Create Dockerfile.backend

Dockerfile.backend

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+# Use an official Node runtime as a parent image
+FROM node:18
+
+# Install nodemon globally
+RUN npm install -g nodemon
+
+# Create a directory for the application
+WORKDIR /app/backend
+
+# Copy package.json and package-lock.json
+COPY backend/package*.json ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the application code
+COPY backend .
+
+# Ensure correct permissions for the Stockfish binary
+RUN chmod +x /app/backend/engine/stockfish
+
+# Expose the port
+EXPOSE 3000
+
+# Define the command to run the backend app
+CMD ["npm", "run", "dev"]