Cannot reach container from another one - docker

Question

I'm trying to call an API from a nodeJS container to another one, without success.
Here's my docker-compose:
version: '3'
services:
alaunt-server:
build:
context: ./
dockerfile: server/Dockerfile
image: alaunt-server
container_name: alauntServer
restart: unless-stopped
alaunt-proxy:
build:
context: ./
dockerfile: proxy/Dockerfile
image: alaunt-proxy
container_name: alauntProxy
ports:
- "5050:5050"
restart: unless-stopped
The Dockerfile from both the services are quite the same:
FROM node:16.19.0-alpine
WORKDIR /home/proxy/
COPY .env .
COPY ./proxy/package.json .
COPY ./proxy/yarn.lock .
COPY ./proxy/. .
RUN yarn
CMD ["yarn", "proxy"]
The server is running internally on a port env.SERVER_PORT.
What I'm trying to do is to have the proxy exposed that calls a not exposed backend (the server).
So I've setup a simple API as following:
axios.get(`http://0.0.0.0:${env.SERVER_PORT}`).then(data => {
res.status(200).send(data.data);
}).catch(er => {
console.log(er)
res.status(500).send(format(500, "error"));
});
But this give me the error ECONNREFUSED.
I suspect this has something to do with the 0.0.0.0 but I've no clue.
What am I doing wrong?
EDIT:
I solved it. I just needed to create a network:
docker network create <your_name>.
And then I just referenced in the docker-compose for each service.
As always, thank you for the useless down vote, this community is getting worse and worse everytime.