update entry node (#829)

Tangle Bay is now completly integrated to einfachIOTA and the new URL should be used.

config.default.json

@@ -14,7 +14,7 @@
   "autopeering": {
     "entryNodes": [
       "2PV5487xMw5rasGBXXWeqSi4hLz7r19YBt8Y1TGAsQbj@ressims.iota.cafe:15626",
-      "5EDH4uY78EA6wrBkHHAVBWBMDt7EcksRq6pjzipoW15B@entrynode.alphanet.tanglebay.org:14656"
+      "5EDH4uY78EA6wrBkHHAVBWBMDt7EcksRq6pjzipoW15B@entrynode.alphanet.einfachiota.de:14656"
     ],
     "port": 14626
   },