allow cfg specification of host/port

cathedral.py

@@ -13,7 +13,7 @@ class cathedral():
         runner = web.ServerRunner(srv)
         await runner.setup()
 
-        site = web.TCPSite(runner, "localhost", 1488)
+        site = web.TCPSite(runner, self.cfg.get("host"), self.cfg.get("port"))
         await site.start()
 
         print("serving...")

config.json

@@ -1,3 +1,5 @@
 {
+    "host": "localhost",
+    "port": 1337,
     "PLUGIN_PATH": "./towers"
 }