Add basic error handling

+ Add express-async-errors package to handle async errors
+ Add ForwaradableError class (Base class for all project-specific errors)
+ Add defaultErrorHandler middleware which handles errors and sends info to the client

src/app.ts

@@ -6,6 +6,10 @@ import argon2 from "argon2";
 import adminRouter from "./Routes/admin.routes";
 import organisationRouter from "./Routes/organisation.routes";
 import groupRouter from "./Routes/group.routes";
+import defaultErrorHandler from "./Middleware/error/handler";
+
+// Set up async error handling
+require("express-async-errors");
 
 require("dotenv").config(); // Load dotenv config
 
@@ -52,6 +56,9 @@ async function main() {
 
   app.use("/api/groups", groupRouter);
 
+  // Error handling
+  app.use(defaultErrorHandler);
+
   app.listen(process.env.PORT, () => {
     console.log(`Listening on Port: ${process.env.PORT}`);
   });