Render hello-world using a html template

slider.py

@@ -1,12 +1,12 @@
 #!/usr/bin/python3
 
-from flask import Flask
+from flask import Flask, render_template
 
 app = Flask(__name__)
 
 @app.route("/")
 def hello():
-    return "Hello slider"
+    return render_template("hello.html")
 
 if __name__ == "__main__":
     app.run()

templates/hello.html

@@ -0,0 +1 @@
+Hello Slider!