Mount pgdata at the directory Postgres 18 actually uses

README.md

@@ -122,7 +122,8 @@ JSON to stdout, nothing else. There is no log table and no log viewer in the app
 
 Two paths hold everything:
 
-- `./pgdata` — the database
+- `./pgdata` — the database. Postgres 18 stores it under a version subdirectory (`18/docker`), so
+  the mount is `/var/lib/postgresql`, not `/var/lib/postgresql/data`
 - `./storage` — audio files and avatars
 
 Both are bind mounts. `storage/tmp/` is in-flight conversions and is safe to skip; it's cleared on

docker-compose.yml

@@ -5,11 +5,10 @@ services:
       POSTGRES_USER: levyraati
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:?set POSTGRES_PASSWORD in .env}
       POSTGRES_DB: levyraati
-      # The 18 image moved its default data directory; pin it so the ./pgdata mount below
-      # is still where the database lives.
-      PGDATA: /var/lib/postgresql/data
     volumes:
-      - ./pgdata:/var/lib/postgresql/data
+      # Postgres 18 keeps its data in /var/lib/postgresql/<version>/docker, so the mount is the
+      # parent directory, not the old /var/lib/postgresql/data.
+      - ./pgdata:/var/lib/postgresql
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U levyraati"]
       interval: 5s