Add sandbox prefix

Author: md-mq

cli/polyaxon/api.py

@@ -10,6 +10,7 @@
 EXTERNAL_V1 = "external/{}".format(VERSION_V1)
 REWRITE_EXTERNAL_V1 = "rewrite-external/{}".format(VERSION_V1)
 K8S_V1 = "k8s/{}".format(VERSION_V1)
+SANDBOX_V1 = "sandbox/{}".format(VERSION_V1)
 WS_V1 = "ws/{}".format(VERSION_V1)
 AUTH_V1 = "auth/{}".format(VERSION_V1)
 STATIC_V1 = "static/{}".format(VERSION_V1)
@@ -33,6 +34,7 @@
 EXTERNAL_V1_LOCATION = "/" + EXTERNAL_V1 + "/"
 REWRITE_EXTERNAL_V1_LOCATION = "/" + REWRITE_EXTERNAL_V1 + "/"
 K8S_V1_LOCATION = "/" + K8S_V1 + "/"
+SANDBOX_V1_LOCATION = "/" + SANDBOX_V1 + "/"
 HEALTHZ_LOCATION = "/healthz/"
 POLYAXON_CLOUD_HOST = "https://cloud.polyaxon.com"
 LOCALHOST = "http://localhost:8000"