[Changes] #7 Error Handling, to include basic custom Error Handling

src/app.ts

@@ -3,6 +3,7 @@ import { config } from 'dotenv';
 import express from 'express';
 import hpp from 'hpp';
 import cache from './cache';
+import * as error from "./error";
 import writeRouter from '@src/controller/write';
 import path  from 'path';
 import logger from '@src/scripts/logger';
@@ -18,12 +19,15 @@ app.use(cache);
 app.get('/', (req, res) => {
   res.send('Hello World, via TypeScript and Node.js!');  
 });
-
 app.use('/write', writeRouter);
 
 // use httpdocs as static folder
 app.use('/', express.static(path.join(__dirname, 'httpdocs')))
 
+// error handling
+app.use(error.notFound);
+app.use(error.handler);
+
 // init server
 app.listen(80, () => {
   logger.log(`Server running //localhost:80`); 

src/scripts/logger.ts

@@ -9,6 +9,9 @@ export default {
 	log: (message:string|JSON) => {
 		fs.appendFileSync(logPath, `${date} \t|\t ${message} \n`);
 		console.log(message);
-
-	}
+	},
+	error: (message:string|JSON|Response.Error) => {
+		fs.appendFileSync(logPath, `${date} \t|\t ERROR: ${message} \n`);
+		console.error(message);
+	},
 }

types.d.ts

@@ -1,7 +1,21 @@
+
+/* eslint-disable @typescript-eslint/no-unused-vars */
+
 type NumericRange<START extends number, END extends number, ARR extends unknown[] = [], ACC extends number = never> = 
   ARR['length'] extends END ? ACC | START | END : 
   NumericRange<START, END, [...ARR, 1], ARR[START] extends undefined ? ACC : ACC | ARR['length']>;
 
+namespace Response {
+	interface Message {
+		message: string;
+		data?: string|JSON;
+	}
+
+	interface Error extends Response.Message {
+		stack?: string,
+		name?: string
+	}
+}
 namespace Models {
 	interface IEntry {
 		/**