Self-Hosted Main

You have to set the docker container name as the destination, not the host IP.

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Test everything from the beginning.

# check your FQDN is set up correctly.

$ nslookup 1.1.1.1

$ nslookup 8.8.8.8

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# Test your web host from out of the docker host.
$ curl -v http://your_fqdn

# test your web host on the host machine.
$ curl -v -H "Host: your_fqdn" http://localhost
# check if your port is exposed if you map it.

docker ps | grep

# check if your mapped port is listening on the docker host
netstat -tlnp | grep

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#check if your container is reachable by NPM.

docker exec -it bash

[root@docker-278f29455e29:/app]# apt update && apt install netcat

[root@docker-278f29455e29:/app]# nc -zv

if NPM reaches docker, you're OK.

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There are many things you have to check more, for example, NPM and your destination container should be in the same docker network.

# docker inspect | grep NetworkID
# docker inspect | grep NetworkID

They should be equal.

etc. etc.