feat: Error handling middleware

feat: Ability to get the db variable from everywhere with getDatabase function
feat: Hello world when getting root url
fix: Now mods model is able to communicate with db
fix: fixed a syntax error in routes/mods.js file which caused sending two responses to the client

src/routes/mods.js

@@ -6,7 +6,7 @@ const router = express.Router();
 // List mods
 router.get("/", async (req,res) => {
         console.debug("Accessing mods list");
-        res.send(controller.getAllMods());
+        controller.getAllMods(req,res);
         // res.send("No list yet");
 });
 

src/routes/root.js

@@ -0,0 +1,10 @@
+const express = require("express");
+const controller = require("../controllers/mods");
+
+const router = express.Router();
+
+router.get('/', (res, req) => {
+    res.send("Hello there!");
+});
+
+module.exports = router;