Updated README.

README.md

@@ -16,4 +16,18 @@ Launch the generation:
     $ packer build misp.json
 
 A VirtualBox image will be generated and stored in the folder
-*output-virtualbox-iso*. You can import it in VirtualBox.
+*output-virtualbox-iso*. You can directly import it in VirtualBox.
+
+
+### Automatic export to GitHub
+
+- create a new release: https://developer.github.com/v3/repos/releases/#create-a-release
+- upload a release asset: https://developer.github.com/v3/repos/releases/#upload-a-release-asset
+
+Example of a binary upload with curl (from the GitHub blog):
+
+    curl -H "Authorization: token <yours>" \
+     -H "Accept: application/vnd.github.manifold-preview" \
+     -H "Content-Type: application/zip" \
+     --data-binary @build/mac/package.zip \
+     "https://uploads.github.com/repos/hubot/singularity/releases/123/assets?name=1.0.0-mac.zip"