README.md

@@ -5,3 +5,5 @@ perl script based on `vnstat-metrics.cgi` which listens on `5599` and returns me
 ## requirements
 
 `cpan install HTTP::Daemon`
+
+set `VNSTAT_METRICS_HOST` or it will default to localhost

metrics.pl

@@ -16,7 +16,7 @@ my @data_resolutions = ('fiveminute', 'hour', 'day', 'month', 'year');
 
 # Create an HTTP::Daemon instance listening on port 9955
 my $d = HTTP::Daemon->new(
-    # LocalAddr => 'localhost',
+    LocalAddr => $ENV{'VNSTAT_METRICS_HOST'} // 'localhost',
     LocalPort => 9955,
 ) || die "Cannot create HTTP::Daemon instance: $!";