uncomment push_server config

roles/matrix-dendrite/templates/dendrite/dendrite.yaml.j2

@@ -353,17 +353,17 @@ user_api:
   # The default lifetime is 3600000ms (60 minutes).
   # openid_token_lifetime_ms: 3600000
 
-# Not in dendrite-config.yaml, but is in build/docker/config/dendrite.yaml (DB is created just in case)
+# Not in dendrite-config.yaml, but is in build/docker/config/dendrite.yaml
 # Configuration for the Push Server API.
-#push_server:
-#  internal_api:
-#    listen: http://localhost:7782
-#    connect: http://localhost:7782
-#  database:
-#    connection_string: {{ matrix_dendrite_database_str }}/{{ matrix_dendrite_pushserver_database }}?sslmode=disable
-#    max_open_conns: 10
-#    max_idle_conns: 2
-#    conn_max_lifetime: -1
+push_server:
+  internal_api:
+    listen: http://localhost:7782
+    connect: http://localhost:7782
+  database:
+    connection_string: {{ matrix_dendrite_database_str }}/{{ matrix_dendrite_pushserver_database }}?sslmode=disable
+    max_open_conns: 10
+    max_idle_conns: 2
+    conn_max_lifetime: -1
 
 # Configuration for Opentracing.
 # See https://github.com/matrix-org/dendrite/tree/master/docs/tracing for information on