XNAMEX made me do it

collabora/docker-compose.yml

@@ -1,13 +1,15 @@
 services:
   collabora:
-    image: collabora/code:latest
+    #image: collabora/code:latest
+    image: collabora/code:24.04.12.4.1
     privileged: true
     container_name: collabora
     environment:
-      - "extra_params=--o:remote_font_config.url=https://$CLOUD/apps/richdocuments/settings/fonts.json --o:ssl.enable=false --o:ssl.termination=true --o:net.post_allow.host[0]=160.202.39.[0-9]{1,3} --o:net.post_allow_host[1]=100.64.0.[0-9]{1,3} --o:per_document.max_concurrency=12 --o:num_prespawn_children=12"
-      - "aliasgroup1=$CLOUD"
-      - 'domain=$CLOUD'
+      - "extra_params=--o:remote_font_config.url=$CLOUD/apps/richdocuments/settings/fonts.json --o:ssl.enable=false --o:ssl.termination=true --o:net.post_allow.host[0]=160.202.39.[0-9]{1,3} --o:net.post_allow_host[1]=100.64.0.[0-9]{1,3} --o:per_document.max_concurrency=12 --o:num_prespawn_children=12"
+      - "aliasgroup1=$CLOUD:443"
+      - "domain1=$CLOUD:443"
       - DONT_GEN_SSL_CERT=true
+      - "server_name=$HOST"
     restart: unless-stopped
     networks: 
       - nginx_proxy

collabora/env.example

@@ -1 +1 @@
-CLOUD=cloud.example.com
+CLOUD=https://cloud.example.com