change lambda handelr error

Author: devksingh4

src/api/lambda.ts

@@ -1,8 +1,9 @@
 import "zod-openapi/extend";
-import awsLambdaFastify from "@fastify/aws-lambda";
+import awsLambdaFastify, { LambdaResponse } from "@fastify/aws-lambda";
 import init from "./index.js";
 import warmer from "lambda-warmer";
 import { type APIGatewayEvent, type Context } from "aws-lambda";
+import { InternalServerError } from "common/errors/index.js";
 
 const app = await init();
 const realHandler = awsLambdaFastify(app, {
@@ -16,7 +17,23 @@ const handler = async (event: APIGatewayEvent, context: Context) => {
     return "warmed";
   }
   // else proceed with handler logic
-  return realHandler(event, context);
+  try {
+    return realHandler(event, context);
+  } catch (e) {
+    console.error(e);
+    const newError = new InternalServerError({
+      message: "Failed to initialize application.",
+    });
+    const json = JSON.stringify(newError.toJson());
+    return {
+      statusCode: newError.httpStatusCode,
+      body: json,
+      headers: {
+        "Content-Type": "application/json",
+      },
+      isBase64Encoded: false,
+    };
+  }
 };
 
 await app.ready(); // needs to be placed after awsLambdaFastify call because of the decoration: https://github.com/fastify/aws-lambda-fastify/blob/master/index.js#L9