Add HACKING.md notes on how to create a new tagged release

HACKING.md

@@ -1,5 +1,11 @@
 # Hacking on Pebble
 
+- [Running the daemon](#running-the-daemon)
+- [Using the CLI client](#using-the-cli-client)
+- [Using Curl to hit the API](#using-curl-to-hit-the-api)
+- [Running the tests](#running-the-tests)
+- [Creating a release](#creating-a-release)
+
 Hacking on Pebble is easy. It's written in Go, so install or [download](https://golang.org/dl/) a copy of the latest version of Go. Pebble uses [Go modules](https://golang.org/ref/mod) for managing dependencies, so all of the standard Go tooling just works.
 
 To compile and run Pebble, use the `go run` command on the `cmd/pebble` directory. The first time you run it, it will download dependencies and build packages, so will take a few seconds (but after that be very fast):
@@ -127,4 +133,16 @@ ok      github.com/canonical/pebble/client  (cached)
 ?       github.com/canonical/pebble/cmd [no test files]
 ok      github.com/canonical/pebble/cmd/pebble  0.165s
 ...
-```
+```
+
+
+## Creating a release
+
+To create a new tagged release, go to the [GitHub Releases page](https://github.com/canonical/pebble/releases) and:
+
+- Click "Create a new release"
+- Enter the version tag (eg: `v1.2.3`) and select "Create new tag: on publish"
+- Enter a release title: include the version tag and a short summary of the release
+- Write release notes: describe new features and bug fixes, and include a link to the full list of commits
+
+Binaries will be created and uploaded automatically to this release by the [release.yml](https://github.com/canonical/pebble/blob/master/.github/workflows/release.yml) GitHub Actions job.