Add custom footer to fix edit URL

Author: CptWesley

_includes/footer_custom.html

@@ -0,0 +1,6 @@
+<script>
+    const button = document.getElementById('edit-this-page');
+    const oldUrl = button.href;
+    const newUrl = oldUrl.replace('/main-repo/', '/');
+    button.href = newUrl;
+</script>