fix(app): Restructure backend

app.py

@@ -4,6 +4,10 @@ import os
 app = Flask(__name__)
 
 @app.route("/DevOps")
-def mainpage():
-    return render_template('index.html')
+def DevOps():
+    return render_template('DevOps.html')
+
+@app.route("/Backend")
+def Backend():
+    return render_template('Backend.html')