Add root endpoint and improve API documentation

main.py

@@ -27,7 +27,25 @@ load_dotenv()
 # Initialize FastAPI app
 app = FastAPI(
     title="vBot - Voice Call Analysis API",
-    description="API for processing and analyzing voice call recordings",
+    description="""
+    vBot is an AI-powered call analysis tool for Asterisk-based PBX systems.
+    
+    ## Features
+    * Voice call transcription using Whisper
+    * Call summary generation
+    * Sentiment analysis
+    * Multi-tenant support with isolated customer databases
+    
+    ## Authentication
+    * Admin access requires username/password
+    * Customer access requires API key
+    
+    ## API Endpoints
+    * POST /api/v1/process-call - Process a voice call recording
+    * GET /api/v1/calls - List all calls for a customer
+    * GET /api/v1/calls/{call_id} - Get specific call details
+    * GET /api/v1/health - Health check endpoint
+    """,
     version="1.0.0"
 )
 
@@ -48,6 +66,28 @@ sentiment_analyzer = pipeline("sentiment-analysis", model=SENTIMENT_MODEL)
 # Include auth router
 app.include_router(auth_router, prefix="/api/v1", tags=["auth"])
 
+@app.get("/")
+async def root():
+    """Root endpoint providing API information"""
+    return {
+        "name": "vBot API",
+        "version": "1.0.0",
+        "description": "AI-powered call analysis tool for Asterisk-based PBX systems",
+        "endpoints": {
+            "process_call": "/api/v1/process-call",
+            "list_calls": "/api/v1/calls",
+            "get_call": "/api/v1/calls/{call_id}",
+            "health_check": "/api/v1/health",
+            "admin": {
+                "create_customer": "/api/v1/customers/",
+                "list_customers": "/api/v1/customers",
+                "get_customer": "/api/v1/customers/{customer_id}",
+                "delete_customer": "/api/v1/customers/{customer_id}"
+            }
+        },
+        "documentation": "/docs"
+    }
+
 async def get_customer_by_api_key(api_key: str = Header(...), db: Session = Depends(get_db)):
     """Get customer by API key"""
     customer = db.query(CustomerModel).filter(