我后来根据 github 上的 issues ，写了一个可以用的，你可以参考下，但依然有点小问题，还不能正常订阅本地 rsshub ，如果需要我可以给你开一个测试用户看看。

version: "3"
services:
service.rss:
image: wangqiru/ttrss:latest
container_name: ttrss
ports:
- 181:80
environment:
- SELF_URL_PATH=https://自己的.dscloud.me:182/ # please change to your own domain
- DB_PASS=这是密码 # use the same password defined in `database.postgres`
- PUID=0
- PGID=0
- ALLOW_PORTS=1200,3000
volumes:
- feed-icons:/var/www/feed-icons/
networks:
- public_access
- service_only
- database_only
stdin_open: true
tty: true
restart: always

service.mercury: # set Mercury Parser API endpoint to `service.mercury:3000` on TTRSS plugin setting page
image: wangqiru/mercury-parser-api:latest
container_name: mercury
networks:
- public_access
- service_only
restart: always

service.opencc: # set OpenCC API endpoint to `service.opencc:3000` on TTRSS plugin setting page
image: wangqiru/opencc-api-server:latest
container_name: opencc
environment:
- NODE_ENV=production
networks:
- service_only
restart: always

database.postgres:
image: postgres:13-alpine
container_name: postgres
environment:
- POSTGRES_PASSWORD=这是密码 # feel free to change the password
volumes:
- ./postgres/data/:/var/lib/postgresql/data # persist postgres data to ~/postgres/data/ on the host
networks:
- database_only
restart: always

# utility.watchtower:
# container_name: watchtower
# image: containrrr/watchtower:latest
# volumes:
# - /var/run/docker.sock:/var/run/docker.sock
# environment:
# - WATCHTOWER_CLEANUP=true
# - WATCHTOWER_POLL_INTERVAL=86400
# restart: always

volumes:
feed-icons:

networks:
public_access: # Provide the access for ttrss UI
service_only: # Provide the communication network between services only
internal: true
database_only: # Provide the communication between ttrss and database only
internal: true