How to set up proxy_pass between a docker containers?

Question

There are 2 services in docker-compose:

service1:
    image: "service1:latest"
    container_name: service1        
    ports:
      - "3011:3000"
service2:
    image: "service2:latest"
    container_name: service2
    depends_on:
      - service1    
    ports:
      - "2000:2000"

Dockerfile for servise2:

FROM nginx:latest
COPY nginx/nginx.conf /etc/nginx/nginx.conf
COPY --from=build /usr/local/app/dist/app /usr/share/nginx/html
EXPOSE 2000

And nginx.conf:

http {
    server {
        listen 2000;
        server_name localhost;
        ...

        location ^~ /service1 {
           proxy_pass http://service1:3011$request_uri;
        }
    }
}

Why am I getting an error when I send request via postman and how can I improve that?

*2 no resolver defined to resolve service1, client: 172.30.0.1, server: localhost, 
request: "GET /service1 HTTP/1.1", host: "localhost:2000"