Adds footer for website

src/util.py

@@ -0,0 +1,11 @@
+import os
+import sys
+
+
+def load_html_str_from_file(file_name: str) -> str:
+    if not os.path.isfile(file_name):
+        print(f"HTML File {file_name} does not exist!")
+        sys.exit(1)
+
+    with open(file_name, "r") as f:
+        return str(f.read())