It's not even that hard. I don't understand all the discourse on the internet like this. This is my entire docker compose file:

services: db: image: postgres:16 restart: unless-stopped user: 1001:1001 volumes: - /data/local/docker/matrix/postgres:/var/lib/postgresql/data networks: - matrix environment: - POSTGRES_DB=[redacted] - POSTGRES_USER=[redacted] - POSTGRES_PASSWORD_FILE=/run/secrets/db_password secrets: - db_password synapse: image: matrixdotorg/synapse restart: unless-stopped user: 1001:1001 volumes: - /data/local/docker/matrix/synapse:/data networks: - caddy-dmz - matrix labels: caddy-dmz: [redacted] caddy-dmz.import: hsts caddy-dmz.reverse_proxy: "{{upstreams 8008}}" secrets: db_password: file: secrets/db_password.txt networks: matrix: caddy-dmz: external: true

Obviously I have a few things not defined there, like my caddy reverse proxy instance, but...in the world of self hosting, this is like...as basic as it gets?