fix ssl

conf/hauptbahnhof.json

@@ -5,6 +5,7 @@
   },
   "websocket": {
     "chainfile": "tls.pem",
+    "private_key": "tls.key",
     "external_host": "localhost",
     "external_port": 8001,
     "internal_host": "localhost",

hauptbahnhof/core/ws.py

@@ -59,7 +59,7 @@ class WebSocket:
 
         # initialize ssl
         self.ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
-        self.ssl_context.load_cert_chain(Path(self.config.get("chainfile")))
+        self.ssl_context.load_cert_chain(Path(self.config.get("chainfile")), Path(self.config.get("private_key")))
 
         self.connections = set()