- Add healthcheck example in compose file.

compose.yaml

@@ -29,6 +29,12 @@ services:
       POSTGRESQL_USER:              ${POSTGRESQL_USER}
       POSTGRESQL_PASSWORD:          ${POSTGRESQL_PASSWORD}
       
+    healthcheck:
+      test: ["CMD-SHELL", "sh -c 'pg_isready -U ${POSTGRESQL_USER} -d ${POSTGRESQL_DATABASE}'"]
+      interval: 10s
+      timeout: 3s
+      retries: 3
+      
     volumes:
       - ./var/lib/pgsql/data:/var/lib/pgsql/data