Reintroduce healthcheck for database

While the new image (ghcr.io/immich-app/postgres:14-vectorchord0.3.0-pgvectors0.2.0) includes a healthcheck now, it only considers POSTGRES_DB and POSTGRES_USER, not POSTGRES_DB_FILE and POSTGRES_USER_FILE used with docker secrets

docker-compose.yml

@@ -62,6 +62,16 @@ services:
     image: ghcr.io/immich-app/postgres:14-vectorchord0.3.0-pgvectors0.2.0
     container_name: immich_db_pg14
     restart: unless-stopped
+    healthcheck:
+      test: [ CMD-SHELL,
+        "pg_isready -d `cat $$POSTGRES_DB_FILE` -U `cat $$POSTGRES_USER_FILE` || exit 1;",
+        "Chksum=$$(psql -d `cat $$POSTGRES_DB_FILE` -U `cat $$POSTGRES_USER_FILE` --tuples-only --no-align --command='SELECT COALESCE(SUM(checksum_failures), 0) FROM pg_stat_database');",
+        "echo 'checksum failure count is $$Chksum';",
+        "[[ $$Chksum = '0' ]] || exit 1"
+      ]
+      interval: 5m
+      start_interval: 30s
+      start_period: 5m
     volumes:
       - db:/var/lib/postgresql/data    
     networks: