Add initial project files

apps/backend/app/exceptions/handler.ts

@@ -0,0 +1,28 @@
+import app from '@adonisjs/core/services/app'
+import { HttpContext, ExceptionHandler } from '@adonisjs/core/http'
+
+export default class HttpExceptionHandler extends ExceptionHandler {
+  /**
+   * In debug mode, the exception handler will display verbose errors
+   * with pretty printed stack traces.
+   */
+  protected debug = !app.inProduction
+
+  /**
+   * The method is used for handling errors and returning
+   * response to the client
+   */
+  async handle(error: unknown, ctx: HttpContext) {
+    return super.handle(error, ctx)
+  }
+
+  /**
+   * The method is used to report error to the logging service or
+   * the third party error monitoring service.
+   *
+   * @note You should not attempt to send a response from this method.
+   */
+  async report(error: unknown, ctx: HttpContext) {
+    return super.report(error, ctx)
+  }
+}