feat: Implement list management routes with CRUD operations

feat: Add sync routes for data synchronization between client and server

feat: Create web routes for serving UI and data visualization

chore: Configure TypeScript for the server project

docs: Update README with project overview, features, and setup instructions

docs: Add server setup implementation details for first-run configuration

docs: Summarize updates and changes in the project, including new features and enhancements

CollabTableServer/src/middleware/auth.ts

@@ -0,0 +1,48 @@
+import { Request, Response, NextFunction } from 'express';
+
+let warningLogged = false;
+
+export const authenticatePassword = (req: Request, res: Response, next: NextFunction) => {
+  const serverPassword = process.env.SERVER_PASSWORD;
+
+  // If no password is set in environment, skip authentication
+  if (!serverPassword) {
+    if (!warningLogged) {
+      console.warn('Warning: SERVER_PASSWORD not set in environment variables. Authentication is disabled.');
+      warningLogged = true;
+    }
+    return next();
+  }
+
+  // Get password from Authorization header (format: "Bearer <password>")
+  const authHeader = req.headers.authorization;
+  
+  if (!authHeader) {
+    return res.status(401).json({ 
+      error: 'Unauthorized', 
+      message: 'No authorization header provided' 
+    });
+  }
+
+  // Parse the authorization header
+  const parts = authHeader.split(' ');
+  if (parts.length !== 2 || parts[0] !== 'Bearer') {
+    return res.status(401).json({ 
+      error: 'Unauthorized', 
+      message: 'Invalid authorization header format. Expected: Bearer <password>' 
+    });
+  }
+
+  const providedPassword = parts[1];
+
+  // Validate password
+  if (providedPassword !== serverPassword) {
+    return res.status(401).json({ 
+      error: 'Unauthorized', 
+      message: 'Invalid password' 
+    });
+  }
+
+  // Password is valid, continue
+  next();
+};