I Want To Generate PDf Using Gotenberg and runing n8n in local using docker

I Am using n8n in docker , Generating PDF using Gutenberg i added the image of this in docker-compose.yml and access with this url http://gotenberg:3000/forms/chromium/convert/html But Same it shows the error

OutPut I Get From Previouse node is

My docker-compose.yml

My Terminal Output:

i Already Try all urls like with http:///localhost:3000, with http://46.224.27.227:3000/

But Same Error COmes

I have went very quickly on the Gotenberg docs ( Installation | Gotenberg ) and I see that you can directly call the API (http://localhost:3000) but before doing anything with n8n setup, can you please make sure that Gotenberg is already working properly, can you please run the below in the terminal:
curl \ --request POST ``https://localhost:3000/forms/chromium/convert/url`` \ --form url=https://sparksuite.github.io/simple-html-invoice-template/ \ -o my.pdf

Yeah it is Accessable

But in the n8n , HTTP Request Node it s Showing Same Error

include this part in the gotenberg service in your docker compose file:
environment:
API_PORT: “3000”

And in the http node use it like this:
http://gotenberg:3000

I have tried it and it worked, for more info, please check the API configuration here