sort out the network

data-template/synapse/homeserver.yaml

@@ -64,6 +64,11 @@ redis:
   host: redis
   port: 6379
 
+# as we want our first launch and subsequent upgrades to go as fast
+# as possible don't sleep between background updates
+background_updates:
+    sleep_enabled: false
+
 email:
   smtp_host: mailhog
   smtp_port: 1025
@@ -90,7 +95,7 @@ email:
 experimental_features:
   msc3861: # OIDC
     enabled: true
-    issuer: http://localhost:8080/
+    issuer: http://matrix-authentication-service:8080/
     client_id: ${MAS_CLIENT_ID}
     client_auth_method: client_secret_basic
     client_secret: '${SECRETS_MAS_CLIENT_SECRET}'