Secrets may not be passed as environment variables anymore.

.woodpecker/docker.yml

@@ -1,8 +1,11 @@
 steps:
   build-bot:
-    secrets: [docker_username, docker_password]
     image: woodpeckerci/plugin-docker-buildx
     settings:
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
       context: bot
       dockerfile: bot/Dockerfile
       repo: dentaku/vollmond-bot
@@ -19,9 +22,12 @@ steps:
       - event: manual
 
   build-webpage:
-    secrets: [docker_username, docker_password]
     image: woodpeckerci/plugin-docker-buildx
     settings:
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
       repo: dentaku/vollmond
       tags:
         - latest