add: check for nightly rollback

src/handlers/list_handler.rs

@@ -104,7 +104,21 @@ fn is_version(name: &str) -> bool {
                 return true;
             }
 
-            hash_regex.is_match(name)
+            if hash_regex.is_match(name) {
+                return true;
+            }
+
+            let alphanumeric_regex = Regex::new(r"^[a-zA-Z0-9]{8}$").unwrap();
+            let separated_version: Vec<&str> = name.split('-').collect();
+
+            if separated_version[0] == "nightly"
+                && (hash_regex.is_match(separated_version[1])
+                    || alphanumeric_regex.is_match(separated_version[1]))
+            {
+                return true;
+            }
+
+            false
         }
     }
 }