FIX: added exception filter to catch unhandled errors

src/error/grpc-to-http-exception.filter.ts

@@ -0,0 +1,22 @@
+import { ExceptionFilter, Catch, ArgumentsHost } from '@nestjs/common';
+import { Response } from 'express';
+
+import ErrorBuilder from '../utils/ErrorBuilder';
+
+@Catch(Error)
+export class GrpcToHttpExceptionFilter implements ExceptionFilter {
+  catch(exception: any, host: ArgumentsHost) {
+    const ctx = host.switchToHttp();
+    const response = ctx.getResponse<Response>();
+
+    // return this exception directly if is already of type ErrorBuilder,
+    // else transform it using the ErrorBuilder
+    const err =
+      exception.constructor.name === ErrorBuilder.name
+        ? exception
+        : new ErrorBuilder(exception.details);
+
+    const { statusCode } = err.response;
+    return response.status(statusCode).json(err.response);
+  }
+}