buildx failed with: ERROR: failed to solve: process "/bin/sh -c DFE_SIGN_IN_API_CLIENT_ID= DFE_SIGN_IN_API_SECRET= DFE_SIGN_IN_API_ENDPOINT= ADMIN_ALLOWED_IPS= ENVIRONMENT_NAME= SUPPRESS_DFE_ANALYTICS_INIT= GOVUK_APP_DOMAIN= GOVUK_WEBSITE_ROOT= SECRET_KEY_BASE_DUMMY=1 bundle exec rake assets:precompile" did not complete successfully: exit code: 1