nginx and node.js in the same container
sudo sh -c "echo '127.0.0.1 app.example.com' >> /etc/hosts"
docker-compose up
curl https://app.example.com -k
=> Hello World
docker exec -it nginxnode_server_1 sh
pkill node
curl https://app.example.com -k
curl: (7) Failed to connect to app.example.com port 443: Connection refused