README: Update the console run command

Add the PG_CONSOLE_DOCKER_IMAGE variable to use the latest version of postgresql_cluster until the next version is released, which includes important features for AWS and Azure:

- #772
- #773

README.md

@@ -206,6 +206,7 @@ docker run -d --name pg-console \
   --publish 8080:8080 \
   --env PG_CONSOLE_API_URL=http://localhost:8080/api/v1 \
   --env PG_CONSOLE_AUTHORIZATION_TOKEN=secret_token \
+  --env PG_CONSOLE_DOCKER_IMAGE=vitabaks/postgresql_cluster:latest \
   --volume console_postgres:/var/lib/postgresql \
   --volume /var/run/docker.sock:/var/run/docker.sock \
   --volume /tmp/ansible:/tmp/ansible \