Update synapse, new option to forget rooms

webserver/docker_matrix/templates/docker-compose.yml

@@ -24,7 +24,7 @@ services:
 
   synapse:
 
-    image: matrixdotorg/synapse:v1.83.0
+    image: matrixdotorg/synapse:v1.98.0
     restart: always
     cpu_count: "1"
     cpuset: "0"

webserver/docker_matrix/templates/synapse-data/homeserver.yaml

@@ -4,6 +4,7 @@ public_baseurl: "{{ matrix.public_url }}/"
 use_presence: false
 allow_public_rooms_without_auth: false
 allow_public_rooms_over_federation: true
+forget_rooms_on_leave: true
 
 listeners:
   - port: 8448