Fix auth again

examples/tests/dockerhub/.dockerignore

@@ -0,0 +1 @@
+*

examples/tests/dockerhub/Pulumi.yaml

@@ -0,0 +1,34 @@
+name: dockerhub
+description: Push to DockerHub with caching
+runtime: yaml
+plugins:
+  providers:
+    - name: docker-build
+      path: ../../../bin
+outputs:
+  ref: ${my-image.ref}
+resources:
+  my-image:
+    type: docker-build:Image
+    properties:
+      tags:
+        - docker.io/pulumibot/buildkit-e2e
+      push: true
+      context:
+        location: .
+      dockerfile:
+        inline: FROM alpine
+      cacheFrom:
+        - registry:
+            ref: docker.io/pulumibot/buildkit-e2e:cache
+      cacheTo:
+        - registry:
+            ref: docker.io/pulumibot/buildkit-e2e:cache
+      registries:
+        - username: pulumibot
+          address: docker.io
+          password: ${dockerHubPassword}
+config:
+  dockerHubPassword:
+    type: string
+    secret: true