Add root endpoint with API information and documentation links

main.py

@@ -1,11 +1,18 @@
-from fastapi import FastAPI
+from fastapi import FastAPI, HTTPException, Request
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse, RedirectResponse
 import os
 
 # Import the router
 from app.api.routes import router as api_router
 
-app = FastAPI(title="AI Content Summariser API")
+app = FastAPI(
+    title="AI Content Summariser API",
+    description="An API for summarizing text content and web pages using NLP models",
+    version="1.0.0",
+    docs_url="/docs",
+    redoc_url="/redoc",
+)
 
 # Configure CORS
 app.add_middleware(
@@ -22,10 +29,48 @@ app.add_middleware(
 # Include the router
 app.include_router(api_router)
 
+@app.get("/", include_in_schema=True)
+async def root():
+    """
+    Root endpoint that provides information about the API and available endpoints.
+    """
+    return {
+        "name": "AI Content Summariser API",
+        "version": "1.0.0",
+        "description": "API for summarizing text content and web pages using NLP models",
+        "endpoints": {
+            "documentation": "/docs",
+            "alternative_docs": "/redoc",
+            "health_check": "/health",
+            "api_endpoints": {
+                "summarise_text": "/api/summarise",
+                "summarise_url": "/api/summarise-url",
+                "status": "/api/status"
+            }
+        },
+        "github_repository": "https://github.com/dang-w/ai-content-summariser-api",
+        "frontend_application": "https://ai-content-summariser.vercel.app"
+    }
+
+@app.get("/docs-redirect")
+async def docs_redirect():
+    """
+    Redirects to the API documentation.
+    """
+    return RedirectResponse(url="/docs")
+
 @app.get("/health")
 async def health_check():
     return {"status": "healthy"}
 
+# Global exception handler for better error responses
+@app.exception_handler(Exception)
+async def global_exception_handler(request: Request, exc: Exception):
+    return JSONResponse(
+        status_code=500,
+        content={"detail": f"An unexpected error occurred: {str(exc)}"}
+    )
+
 if __name__ == "__main__":
     import uvicorn
     uvicorn.run(app, host="0.0.0.0", port=int(os.environ.get("PORT", 8000)))