Feature/stdout error messages for nodejs example codes

[c0ridrew]

Description

Add try catch to capture error response in nodejs example codes

Before

calling post unix:/Users/andrew/.nodex/run/nodex.sock:/custom_metrics
node:internal/process/promises:289
            triggerUncaughtException(err, true /* fromPromise */);
            ^

HTTPError: Response code 400 (Bad Request)

After

calling post unix:/Users/andrew/.nodex/run/nodex.sock:/custom_metrics
Error in API call: Response code 400 (Bad Request)
Error response: Json deserialize error: invalid type: integer `1732080288808`, expected a string at line 1 column 59
node:internal/process/promises:289
            triggerUncaughtException(err, true /* fromPromise */);
            ^

HTTPError: Response code 400 (Bad Request)