Switch to Ko for building docker images

.woodpecker.yml

@@ -2,17 +2,17 @@ labels:
   platform: linux/amd64
 
 steps:
-  publish:
-    image: woodpeckerci/plugin-kaniko
-    settings:
-      registry: gitea.elara.ws
-      repo: elara6331/seashell
-      tags: latest,${CI_COMMIT_TAG}
-      cache: false
-      username:
-        from_secret: docker_username
-      password:
-        from_secret: docker_password
+  docker:
+    image: gitea.elara.ws/elara6331/builder
+    environment:
+      - REGISTRY=gitea.elara.ws
+      - REGISTRY_USERNAME=Elara6331
+      - KO_DOCKER_REPO=gitea.elara.ws/seashell
+      - KO_DEFAULTBASEIMAGE=gitea.elara.ws/elara6331/static
+    secrets: [ registry_password ]
+    commands:
+      - registry-login
+      - ko build -B --platform=linux/amd64,linux/arm64,linux/riscv64 -t latest,${CI_COMMIT_TAG} --sbom=none
     when:
       event: tag