Nuget and marketplace info

Author: tcmorris

docs/README_nuget.md

@@ -4,4 +4,22 @@
 [![NuGet](https://img.shields.io/nuget/vpre/Umbraco.Community.Sustainability?color=0273B3)](https://www.nuget.org/packages/Umbraco.Community.Sustainability)
 [![GitHub license](https://img.shields.io/github/license/rickbutterfield/Umbraco.Community.Sustainability?color=8AB803)](https://github.com/rickbutterfield/Umbraco.Community.Sustainability/blob/main/LICENSE)
 
-TODO: describe your package for nuget audience
+A community package from the [Umbraco sustainability team](https://umbraco.com/blog/meet-the-new-community-sustainability-team/), which helps developers and editors see and improve the carbon impact of their websites.
+
+In the backoffice, there is a content app to see page weight and carbon emissions, which is then converted to a carbon rating for individual pages.
+
+<img src="https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-contentapp-2.jpeg" alt="Umbraco.Community.Sustainability content app" />
+
+## Installation
+
+Add the package to an existing Umbraco website (v10.4+) from nuget:
+
+`dotnet add package Umbraco.Community.Sustainability`
+
+Once added, a new content app will be available alongside your Umbraco pages allowing you to trigger a sustainability report.
+
+## License
+
+Copyright &copy; [Rick Butterfield](https://rickbutterfield.dev), and other contributors.
+
+Licensed under the [MIT License](https://github.com/rickbutterfield/Umbraco.Community.Sustainability/blob/main/LICENSE.md).

umbraco-marketplace.json

@@ -1,14 +1,27 @@
 {
-    "$schema": "https://marketplace.umbraco.com/umbraco-marketplace-schema.json", 
-    "AuthorDetails": {
-      "Name": "Umbraco Sustainability Community Team",
-      "ImageUrl": "https://github.com/rickbutterfield.png"
+  "$schema": "https://marketplace.umbraco.com/umbraco-marketplace-schema.json",
+  "AuthorDetails": {
+    "Name": "Umbraco Sustainability Community Team",
+    "ImageUrl": "https://github.com/rickbutterfield.png"
+  },
+  "Category": "Editor Tools",
+  "Description": "Sustainability extensions for Umbraco.",
+  "LicenseTypes": [ "Free" ],
+  "IssueTrackerUrl": "https://github.com/rickbutterfield/Umbraco.Community.Sustainability/issues",
+  "PackageType": "Package",
+  "Screenshots": [
+    {
+      "ImageUrl": "https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-contentapp-1.jpeg",
+      "Caption": "Content app for Sustainability - running a report"
     },
-    "Category": "",
-    "Description": "",
-    "LicenseTypes": [ "Free" ],
-    "IssueTrackerUrl": "https://github.com/rickbutterfield/Umbraco.Community.Sustainability/issues",
-    "PackageType": "Package",
-    "Tags": [],
-    "Title": "Umbraco.Community.Sustainability"
-  }
+    {
+      "ImageUrl": "https://raw.githubusercontent.com/rickbutterfield/Umbraco.Community.Sustainability/main/.github/assets/sustainability-contentapp-2.jpeg",
+      "Caption": "Content app for Sustainability - view detailed report"
+    }
+  ],
+  "Tags": [
+    "backoffice",
+    "sustainability"
+  ],
+  "Title": "Umbraco.Community.Sustainability"
+}