support specifying ports as env vars

lib/index.js

@@ -29,10 +29,13 @@ app.get('/invite', (req, reply) => {
   reply.view('invite.ejs')
 })
 
-app.listen({ port: 3000 }, (err, address) => {
-  if (err) {
-    app.log.error(err)
-    process.exit(1)
+app.listen(
+  { host: '0.0.0.0', port: process.env.HTTP_PORT ?? 3000 },
+  (err, address) => {
+    if (err) {
+      app.log.error(err)
+      process.exit(1)
+    }
+    startPeer()
   }
-  startPeer()
-})
+)

lib/peer.cjs

@@ -25,7 +25,12 @@ module.exports = function startPeer() {
         connections: {
           incoming: {
             net: [
-              { scope: 'public', transform: 'shse', port: 8008, host: '0.0.0.0' },
+              {
+                scope: 'public',
+                transform: 'shse',
+                port: process.env.PPPPP_PORT ?? 8008,
+                host: '0.0.0.0',
+              },
             ],
           },
           outgoing: {