chore: disable cosign for now (#22)

fulcio signing seems to have broken, disable cosign until we can set up
signing keys.

.github/workflows/docker-publish.yml

@@ -79,15 +79,16 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
 
-      # Sign the resulting Docker image digest except on PRs.
-      # This will only write to the public Rekor transparency log when the Docker
-      # repository is public to avoid leaking data.  If you would like to publish
-      # transparency data even for private images, pass --force to cosign below.
-      # https://github.com/sigstore/cosign
-      - name: Sign the published Docker image
-        if: ${{ github.event_name != 'pull_request' }}
-        env:
-          COSIGN_EXPERIMENTAL: "true"
-        # This step uses the identity token to provision an ephemeral certificate
-        # against the sigstore community Fulcio instance.
-        run: cosign sign ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build-and-push.outputs.digest }}
+      # TODO: uncomment when we have a signing key set up, fulcio no longer working
+      ## Sign the resulting Docker image digest except on PRs.
+      ## This will only write to the public Rekor transparency log when the Docker
+      ## repository is public to avoid leaking data.  If you would like to publish
+      ## transparency data even for private images, pass --force to cosign below.
+      ## https://github.com/sigstore/cosign
+      #- name: Sign the published Docker image
+      #  if: ${{ github.event_name != 'pull_request' }}
+      #  env:
+      #    COSIGN_EXPERIMENTAL: "true"
+      #  # This step uses the identity token to provision an ephemeral certificate
+      #  # against the sigstore community Fulcio instance.
+      #  run: cosign sign ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.build-and-push.outputs.digest }}