Apollo Federation cannot get connection running in docker-compose: Couldn't load service definitions for...reason: connect ECONNREFUSED 127.0.0.1:80 - kotlin

Question

I am trying to run two applications by docker-compose without success, the federation cannot connect on service. Both works well out of docker.
Below follow the projects:
Apollo Server Federation in NodeJS
GraphQL API In Kotlin + Spring Boot + expediagroup:graphql-kotlin-spring-server
docker-compose.yml
version: '3'
services:
myservice:
image: 'myservice:0.0.1-SNAPSHOT'
container_name: myservice_container
ports:
- 8080:8080
expose:
- 8080
apollo_federation:
image: 'apollo-federation'
build: '.'
container_name: apollo_federation_container
restart: always
ports:
- 4000:4000
expose:
- 4000
environment:
ENDPOINT: "http://myservice/graphql"
depends_on:
- myservice
I already try a lot of combinations in my endpoint ex: http://myservice:8080/graphql, http://localhost:8080/graphql, http://myservice, etc...
index.js from Apollo Project
const { ApolloServer } = require("apollo-server");
const { ApolloGateway } = require("#apollo/gateway");
const gateway = new ApolloGateway({
serviceList: [
{ name: "Service1", url: process.env.ENDPOINT || 'http://localhost:8080/graphql' },
]
});
const server = new ApolloServer({
gateway,
subscriptions: false
});
server.listen().then(({ url }) => {
console.log(`🚀 Server ready at ${url}`);
})
Error Log
Error checking for changes to service definitions: Couldn't load service definitions for "Service1" at http://myservice/graphql: request to http://myservice/graphql failed, reason: connect ECONNREFUSED 172.18.0.3:80
if I try to test from browse I get a error 500 by graphiql.
I am already tried to use a nginx as reverse-proxy, but no success
I am using the last libs in projects.
Thanks

Answer 1

In your code, you are using
{ name: "Service1", url: process.env.ENDPOINT || 'http://localhost:8080/graphql' },
which is pulling process.env.ENDPOINT, which is defined in your docker-compose file as using port 80:
environment:
ENDPOINT: "http://myservice/graphql" # This is port 80