Update app.py

app.py

@@ -1,9 +1,18 @@
 import subprocess
 from fastapi import FastAPI
+from fastapi.responses import HTMLResponse
 app = FastAPI()
 
 subprocess.Popen(["python3", "TimeStampBuddy/cron_processor.py"])
 
-@app.get("/")
+@app.get("/", response_class=HTMLResponse)
 def welcome():
-    return "Hello! This service powers the TimeStampBuddy activity on Twitter. For more details, visit https://github.com/Mihaiii/TimeStampBuddy ."
+    return """
+    <div>
+        <h1>Hello!</h1>
+        <p>This service powers the TimeStampBuddy activity on Twitter.</p>
+        <p>For more details, visit 
+            <a href="https://github.com/Mihaiii/TimeStampBuddy">GitHub Repository</a>.
+        </p>
+    </div>
+    """