Wer docker-compose für Collabora CODE nutzt und gerade feststellt, dass der Container von einem restart in den nächsten rutscht:

docker logs --tail 50 --follow --timestamps code-container-name

Findet darin

2022-04-09T05:19:00.304230963Z -e ERR: Use of domain variable is not supported. First host/domain who tries to connect to COOL is always allowed. 
2022-04-09T05:19:00.304248902Z To allow multiple host and its aliases use something like this and pass it as env variable: 
2022-04-09T05:19:00.304251820Z aliasgroup1=https://domain1:443,https://its-alias|its-second-alias:443  
2022-04-09T05:19:00.304254556Z aliasgroup2=https://domain2:443,https://its-alias:443  
2022-04-09T05:19:00.304256886Z For more info: https://sdk.collaboraonline.com/docs/installation/CODE_Docker_image.html

und darf die .env sowie die docker-compose.yml anpassen. Zuerst zur .env:

COLLABORA_USERNAME=admin 
COLLABORA_PASSWORD=supergeheim 
COLLABORA_ALIASGROUP1=https://www.domain1.tld:443,https://domain2\\.tld:443|https://www\\.domain3\\.tld:443

und somit die docker-compose.yml:

version: '3' 
services: 
 code: 
   image: collabora/code:latest 
   restart: unless-stopped 
   environment: 
     - password=${COLLABORA_PASSWORD} 
     - username=${COLLABORA_USERNAME} 
     - aliasgroup1=${COLLABORA_ALIASGROUP1} 
     - extra_params=--o:ssl.enable=true 
   ports: 
     - 9980:9980

Dann flutscht es wieder. Mehr dazu findet mensch hier.