add root endpoint to provide welcome message for the Text Summarization API

main.py

@@ -9,6 +9,11 @@ summarizer = pipeline("summarization", model="facebook/bart-large-cnn")
 class TextInput(BaseModel):
     text: str
 
+
+@app.get("/")
+async def root():
+    return {"message": "Welcome to the Text Summarization API!"}
+
 @app.post("/summarize")
 async def summarize_text(input: TextInput):
     summary = (summarizer(input.text, max_length=130, min_length=30, do_sample=False))