output sha256sum for uploaded bundle (#213)

* output sha256sum for uploaded bundle

* include sha256sum in the bundle

* use shasum -a 256

Author: vyzo

.github/workflows/ci.yml

@@ -88,4 +88,5 @@ jobs:
         name: bundle
         path: |
          output/builtin-actors.car
+         output/builtin-actors.car.sha256sum
          output/upload.json

upload-bundle.sh

@@ -3,5 +3,9 @@
 set -e
 
 bundle=output/builtin-actors.car
+
+shasum -a 256 $bundle > $bundle.sha256sum
+cat $bundle.sha256sum
+
 curl -k -X POST -F "data=@${bundle};type=application/octet-stream;filename=\"${bundle}\"" -H "Authorization: Bearer $ESTUARY_TOKEN" -H "Content-Type: multipart/form-data" https://shuttle-4.estuary.tech/content/add > output/upload.json
 cat output/upload.json