Add instructions on how to manually publish an ORB

Might be necessary for authorization issues or to have better control.

Author: elia

.gitignore

@@ -0,0 +1 @@
+/build/*.yml

README.md

@@ -75,6 +75,15 @@ release a new version of the Orb, using semver and following these rule:
 > modifications to executors, examples, or @orb.yml trigger a minor release;
 > modifications to the orb’s config.yml file trigger a patch release;
 
+### Publish a development version from the CLI
+
+Reference: https://circleci.com/docs/2.0/creating-orbs/#using-the-cli-to-publish-orbs
+
+1. Setup the CircleCI CLI (https://circleci.com/docs/2.0/creating-orbs/#step-1---set-up-the-circleci-cli)
+2. Buid a one-file version of the orb with `circleci config pack src/ > build/orb.yml`
+3. Publish the ORB with a development version (e.g. one linked to your current PR): `circleci orb publish build/orb.yml solidusio/extensions@dev:pr-123`
+4. Test the ORB on a project updating the version `solidusio_extensions: solidusio/extensions@dev:pr-123`
+
 ## License
 
 The Orb is available as open source under the terms of the MIT License