🐛(keycloak) fix database env variables in the self-hosting example

The Keycloak container ignored KC_DB_HOST, KC_DB_NAME and KC_DB_USER:
the Quarkus distribution expects KC_DB_URL_HOST, KC_DB_URL_DATABASE and
KC_DB_USERNAME instead. Keycloak silently fell back to its default JDBC
URL on localhost:5432 and could not reach the database container.

The host value also pointed to "postgresql" while the service is named
kc_postgresql in the example compose file, so it is fixed as well.

These names already match the ones used in env.d/development/kc_auth.

Signed-off-by: risk-alt <aldu6974@gmail.com>

CHANGELOG.md

@@ -24,6 +24,7 @@ and this project adheres to
 - 🐛(backend) ignore CSPs for API docs in development
 - 🐛(frontend) export images embedded with a relative url #2573
 - 🐛(y-provider) fix sentry init #2579
+- 🐛(keycloak) fix database env variables in the self-hosting example #2572
 - 🐛(helm) show the database error while jobs wait for it to be ready #2578
 
 ## [v5.4.1] - 2026-07-09

env.d/production.dist/kc_postgresql

@@ -7,7 +7,7 @@ PGDATA=/var/lib/postgresql/data/pgdata
 # Keycloak postgresql configuration
 KC_DB=postgres
 KC_DB_SCHEMA=public
-KC_DB_HOST=postgresql
-KC_DB_NAME=${POSTGRES_DB}
-KC_DB_USER=${POSTGRES_USER}
+KC_DB_URL_HOST=kc_postgresql
+KC_DB_URL_DATABASE=${POSTGRES_DB}
+KC_DB_USERNAME=${POSTGRES_USER}
 KC_DB_PASSWORD=${POSTGRES_PASSWORD}