Scala/Play how to get to the activator on VPS?

Question

Scala

With the command activator ui. The server starts fine and says
Found previous process id: 22835
Local repository: activator-launcher-local @ file:/root/activator-1.3.10-minimal/repository
Play server process ID is 23384
[info] play - Application started (Prod)
[info] play - Listening for HTTP on /127.0.0.1:8888
[info] aesSlf4jLogger - Slf4jLogger started
Unable to open a web browser!
Please point your browser at:
127.0.0.1:8888
But when you connect to the server's ip address + port 8888, nothing opens. Who knows what's the problem?
While a normal application, with the command
activator run
[info] Loading project definition from /myAppScala/project
[info] Set current project to myAppScala (in build file:/myAppScala/)
--- (Running the application, auto-reloading is enabled) ---
[info] pcsNettyServer - Listening for HTTP on /0:0:0: 0:0:0:0:0:9000
(Server started, use Ctrl+D to stop and go back to the console...)
Works great on server ip and port 9000

Answer 1

So he writes in Russian.
[info] play - Listening for HTTP on /127.0.0.1:8888
Please point your browser at:
127.0.0.1:8888
This means that the port has risen only on the localhost and is not accessible from the outside.
And this
[info] pcsNettyServer - Listening for HTTP on /0:0:0:0:0:0:0:0:9000
means that the port is up on all available interfaces.
Either edit the settings so that the port listens on the external ip or use Apache / nginx to proxy requests.