More attempts to fix docker

docker/ws.Dockerfile

@@ -0,0 +1,29 @@
+# Dockerfile for WebSocket server only
+
+FROM node:20-alpine
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install only production dependencies
+RUN npm install --omit=dev
+
+# Copy only the websocket server code
+COPY src/websocket-server.js ./src/
+
+# Create a non-root user and group with the node user ID
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S -u 1001 -G nodejs nodejs
+
+# Switch to non-root user
+USER nodejs
+
+# Set environment variables
+ENV NODE_ENV=production
+ENV WS_PORT=3001
+
+# Start the WebSocket server
+CMD ["node", "src/websocket-server.js"]