Fix permissions

tests/lakedrops.yml

@@ -11,10 +11,10 @@
 
 .test_lakedrops_theme: &test_lakedrops_theme
   before_script:
-    - DIR=$(dc exec php pwd)
+    - DIR=$(dc exec -u root php pwd)
     - dc cp ${THEME_CSS_PATH} php:${DIR}/${THEME_CSS_PATH}
   after_script:
-    - dc exec php rm -rf ${THEME_CSS_PATH}
+    - dc exec -u root php rm -rf ${THEME_CSS_PATH}
 
 Test Code Style:
   <<: *test_lakedrops_default