feat(reana_dev): add --live-logs flag (#827)

reana/reana_dev/cluster.py

@@ -294,6 +294,7 @@ def cluster_build(
     default="reana",
     help="REANA instance name",
 )
+@click.option("--live-logs", is_flag=True, help="Enable live job logs.")
 def cluster_deploy(
     namespace,
     job_mounts,
@@ -303,6 +304,7 @@ def cluster_deploy(
     admin_email,
     admin_password,
     instance_name,
+    live_logs,
 ):  # noqa: D301
     """Deploy REANA cluster.
 
@@ -349,6 +351,9 @@ def job_mounts_to_config(job_mounts):
     if mode in ("debug"):
         values_dict.setdefault("debug", {})["enabled"] = True
 
+    if live_logs:
+        values_dict.setdefault("opensearch", {})["enabled"] = True
+
     if exclude_components:
         standard_named_exclude_components = [
             find_standard_component_name(c) for c in exclude_components.split(",")