https://github.com/getodk/central/pull/1671#discussion_r2897275363

Author: brontolosone

docker-compose.yml

@@ -59,11 +59,11 @@ services:
       # 1. PGVAR specified in .env. This includes declarations with empty values, for instance, to use an empty password (PGPASSWORD=).
       # 2. Corresponding legacy DB_VAR in .env. These are legacy overrides for custom database connections.
       # 3. ODK default value.
-      - PGHOST=${PGHOST-${DB_HOST-postgres14}}
-      - PGDATABASE=${PGDATABASE-${DB_NAME-central}}
-      - PGUSER=${PGUSER-${DB_USER-odk}}
-      - PGPASSWORD=${PGPASSWORD-${DB_PASSWORD-odk}}
-      - PGAPPNAME=${PGAPPNAME-odkcentral}
+      - PGHOST=${PGHOST-${DB_HOST:-postgres14}}
+      - PGDATABASE=${PGDATABASE-${DB_NAME:-central}}
+      - PGUSER=${PGUSER-${DB_USER:-odk}}
+      - PGPASSWORD=${PGPASSWORD-${DB_PASSWORD:-odk}}
+      - PGAPPNAME=${PGAPPNAME:-odkcentral}
       # End of libpq connection env var preparation.
       - DB_POOL_SIZE=${DB_POOL_SIZE:-10}
       - EMAIL_FROM=${EMAIL_FROM:-no-reply@$DOMAIN}