Running Nodejs application on VPS OVH

I just rent a VPS at OVH and i'm trying to run a Nodejs application on port 1337. The application runs correctly, when I try :

curl 0.0.0.0:1337

It gives me the code of the page (works with 127.0.0.1 too)

But when I try to connect to 176.31.184.111:1337, it doesn't work.

#root: iptables -L -v -n

Chain INPUT (policy ACCEPT 8645 packets, 592K bytes)
    pkts bytes target     prot opt in     out     source           destination

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
    pkts bytes target     prot opt in     out     source           destination

Chain OUTPUT (policy ACCEPT 7556 packets, 729K bytes)
    pkts bytes target     prot opt in     out     source           destination