Update README.md (#193)

* Update README.md

- Add common sections to doc
- Fix 404 docs link
- Expand NAP2 description

* Add link to constructor project

* Add link to constructor and packaging  in napari docs

* Add link to constructor docs

* Add comment about target user

* Add tests CI badge

* Add tests UI status badge

* Comment out usage pending questions

* Apply suggestions from @psobolewski code review

Co-authored-by: Peter Sobolewski <[email protected]>

---------

Co-authored-by: Peter Sobolewski <[email protected]>

README.md

@@ -1,8 +1,27 @@
-# napari packaging
+# packaging - conda-based napari installers
 
-This repository stores the CI pipelines and helper scripts needed to create conda-based napari installers for Linux, macOS and Windows.
+[![tests](https://github.com/napari/packaging/actions/workflows/tests.yml/badge.svg)](https://github.com/napari/packaging/actions/workflows/tests.yml)
+[![tests_ui](https://github.com/napari/packaging/actions/workflows/tests_ui.yml/badge.svg)](https://github.com/napari/packaging/actions/workflows/tests_ui.yml)
+
+**Important: This repo is used by napari core maintainers.**
+
+## Description
+
+This repository stores the tools (CI pipelines and helper scripts) needed to create **conda-based**
+napari installers for Linux, macOS and Windows. It uses the [constructor](https://github.com/conda/constructor)
+tool which allows [constructing an installer](https://conda.github.io/constructor/) for a collection
+of conda packages.
+
+## Documentation
 
 You can find more information in the following resources:
 
-* [Napari docs about packaging](https://napari.org/stable/developers/packaging.html)
-* [NAP-2](https://napari.org/dev/naps/2-conda-based-packaging.html)
+* [Napari docs about packaging](https://napari.org/dev/developers/coredev/packaging.html)
+* [Napari docs about creating installers using this repo and the constructor tool](https://napari.org/dev/developers/coredev/packaging.html#installers)
+* [NAP-2: Distributing napari with conda-based packaging](https://napari.org/stable/naps/2-conda-based-packaging.html)
+
+<!---
+## Usage
+
+TODO: add basics
+-->