I spent good amount of time last week to figure out how to make Expressjs app to listen on a specific port (say, 3005) for one of the projects. Regular PM2 setup involves creating a new config block in the ecosystem file.
{
"apps": [
{
"name": "api",
"script": "/var/www/api/app.js",
"ignore_watch": ["frontend/", ".*"],
"log_date_format": "YYYY-MM-DD HH:mm",
"env": {
"NODE_ENV": "production",
"PORT": "3001"
}
}
]
}
This works for regular nodejs app, however, if your APIs are using expressjs framework, its a bit different. All you need to change is, instead of app.js as the start script, you have to use bin/www in ecosystem config. So, the updated config looks like this:
{
"apps": [
{
"name": "api",
"script": "/var/www/api/bin/www",
"ignore_watch": ["frontend/", ".*"],
"log_date_format": "YYYY-MM-DD HH:mm",
"env": {
"NODE_ENV": "production",
"PORT": "3005"
}
}
]
}
And this will work like a charm!