reuse errors.JS and hash.JS

from https://codeberg.org/buzzcode2007/FCC-Project-URLShortener/src/branch/main/scripts/utilities

scripts/utilities/errors.JS

@@ -0,0 +1,25 @@
+class CustomErrors {}
+
+CustomErrors.URL = class URL_Error extends Error {
+    constructor(message, URL) {
+        super((message) ? message : `invalid url`);
+        this.name = "URL Problem";
+        this.stack = URL;
+    };
+}
+
+CustomErrors.DBProblem = class DB_Error extends Error {
+    constructor(message) {
+        super(message);
+        this.name = "Database Problem"
+    }
+}
+
+CustomErrors.HashProblem = class DB_Error extends Error {
+    constructor(message) {
+        super(message);
+        this.name = "Hash Problem"
+    }
+}
+
+module.exports = CustomErrors