lower case

.woodpecker/.build.yml

@@ -1,12 +1,12 @@
 pipeline:
     build_and_publish:
         image: woodpeckerci/plugin-docker-buildx
-        secrets: [ DOCKERHUB_USER ]
+        secrets: [ dockerhub_user ]
         settings:
             context: ./build
-            repo: ${DOCKERHUB_USER}/${CI_REPO_NAME}
+            repo: ${dockerhub_user}/${CI_REPO_NAME}
             username:
-                from_secret: DOCKERHUB_USER
+                from_secret: dockerhub_user
             password:
                 from_secret: DOCKERHUB_TOKEN
         when: