refactor: write error logs into a file

src/logger.js

@@ -1,3 +1,4 @@
+import fs from "fs";
 function timestamp() {
 	return new Date().toISOString();
 }
@@ -44,6 +45,9 @@ export const logger = {
 		log("warn", step, message, details);
 	},
 	error(step, message, details) {
+		fs.writeFileSync("./logs.err.log", `${step}, ${message}, ${details}`, {
+			encoding: "utf-8",
+		});
 		log("error", step, message, details);
 	},
 	debug(step, message, details) {