chore(contributing): update publishing docs

CONTRIBUTING.md

@@ -1,10 +1,37 @@
 # Contributing
 
-## Release
+Pull requests are welcome!
+
+To begin, clone the repo, then install dependencies.
+
+```
+npm install
+```
+
+The source code is written in TypeScript. Spin up the compiler to watch for source changes:
 
 ```
-npm version patch
-npm publish
-git push
-git push --tags
+npm run watch
 ```
+
+## Publishing
+
+CI automatically publishes the next version semantically from analyzing commits in `stable`. To maintain a shared history between `master` and `stable`, the branches must be rebased with each other locally.
+
+* When it's time to cut a release from `master`:
+
+    ```
+    git checkout stable
+    git merge --ff-only master
+    git push origin stable
+    ```
+
+* Await successful publish in CI. Ionitron will push the updated versions and tags to `stable`.
+* Sync `master` with `stable`.
+
+    ```
+    git pull origin stable
+    git checkout master
+    git merge --ff-only stable
+    git push origin master
+    ```