Add healthcheck for Postgres

docker-compose.yml

@@ -12,6 +12,11 @@ services:
       POSTGRES_DB: ${POSTGRES_DB:-keycloak}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-keycloak}
       POSTGRES_USER: ${POSTGRES_USER:-keycloak}
+    healthcheck:
+      test: ["CMD-SHELL", "sh -c 'pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}'"]
+      interval: 30s
+      timeout: 15s
+      retries: 5
 
   keycloak:
     image: crdm-keycloak:${KC_TAG:-latest}