server.listen bind to ipv6 too

server/server.js

@@ -40,7 +40,10 @@ const passwordHash = require("./password-hash");
 const args = require("args-parser")(process.argv);
 
 const version = require("../package.json").version;
-const hostname = process.env.HOST || args.host || "0.0.0.0"
+
+// If host is omitted, the server will accept connections on the unspecified IPv6 address (::) when IPv6 is available, or the unspecified IPv4 address (0.0.0.0) otherwise.
+const hostname = process.env.HOST || args.host;
+
 const port = parseInt(process.env.PORT || args.port || 3001);
 
 console.info("Version: " + version)
@@ -568,7 +571,13 @@ let indexHTML = fs.readFileSync("./dist/index.html").toString();
 
     console.log("Init")
     server.listen(port, hostname, () => {
-        console.log(`Listening on ${hostname}:${port}`);
+
+        if (hostname) {
+            console.log(`Listening on ${hostname}:${port}`);
+        } else {
+            console.log("Listening on ${port}");
+        }
+
         startMonitors();
     });