docs(readme): some instructions

.github/workflows/release.yml

@@ -5,7 +5,7 @@ on:
   release:
     types: [published]
 jobs:
-  build:
+  publish:
     # 2019, has our .NET needs, latest does not
     runs-on: windows-2019
     steps:

README.md

@@ -1,2 +1,16 @@
 # Elements.Quantity
-Handful .NET library for working with various physical quantities, including conversions, formatting and parsing
+Handful .NET library for working with various physical quantities, including conversions, formatting and parsing.
+
+![NuGet](https://img.shields.io/nuget/v/YellowDogMan.Elements.Quantity.svg)
+
+## Building
+This library should be build-able using a standard Visual Studio setup. As there are no dependencies, it is usually quite fast.
+
+## Publishing a New Nuget Version
+
+Version releases are handled automatically by GitHub Actions. You do need to trigger a release though. To do this:
+1. Git Tag a git commit with the new version number. Tags must be in the format: `version number` without any prefixes or suffixes. E.g.`1.0.0`
+1. Push that Tag to Github however you'd like e.g. `git push --tags`
+1. [Draft a new GitHub Release](https://github.com/Yellow-Dog-Man/Elements.Quantity/releases/new) using that tag in the "Choose a tag" drop down.
+1. Write suitable release notes, If PRs were used the "Generate release notes" button will automatically populate them.
+1. Publish the release.