Update app.py

app.py

@@ -6,7 +6,7 @@ import os
 app = Flask(__name__)
 @app.route("/",methods=["GET", "POST"])
 def getInfotoMeasure():
-    return render_template("gui.html")
+    return render_template("view_pdf.html")
 # Route to serve the PDF in iframe
 @app.route('/view-pdf')
 def view_pdf():