Add us-metadata extension to datagov theme

Author: akariv

.docker-compose.datagov-theme.yaml

@@ -13,7 +13,8 @@ services:
           install_standard_ckan_extension_github ckan/ckanext-harvest ckanext-harvest &&\
           install_standard_ckan_extension_github ckan/ckanext-dcat ckanext-dcat &&\
           install_standard_ckan_extension_github GSA/ckanext-datajson ckanext-datajson &&\
-          install_standard_ckan_extension_github GSA/ckanext-geodatagov ckanext-geodatagov
+          install_standard_ckan_extension_github GSA/ckanext-geodatagov ckanext-geodatagov &&\
+          install_standard_ckan_extension_github GSA/usmetadata ckanext-usmetadata
         POST_DOCKER_BUILD: |
           mkdir -p /var/tmp/ckan/dynamic_menu
         CKAN_INIT: |