Update readme, icon license and build matrix

Author: devlead

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-latest]
+        os: [windows-latest, ubuntu-latest, macos-latest]
     steps:
       - name: Get the sources
         uses: actions/checkout@v2

README.md

@@ -1,2 +1,44 @@
 # DPI
-Dependency Inventory .NET Tool - Inventories dependencies to Azure Log Analytics
+
+Dependency Inventory .NET Tool - Inventories dependencies and reports to Azure Log Analytics
+
+## Obtain
+
+`dotnet tool install -g dpi`
+
+## Commands
+
+Use `-h` / `--help` to get current list of available commands and options. 
+
+```bash
+dpi --help
+```
+
+### nuget
+
+The NuGet branch of commands have recursively from given path inventories packages present in
+
+* csproj (project assets if restored)
+* packages.config
+* .NET Tool manifests
+* Cake build script files
+
+#### analyze
+
+**nuget analyze** command inventories and outputs result to console or file.
+
+```bash
+dpi nuget --output table analyze
+```
+
+#### report
+
+**nuget report** analyzes and reports result to Azure Log Analytics.
+
+```bash
+export NuGetReportSettings_WorkspaceId=<workspaceid>
+
+export NuGetReportSettings_SharedKey=<sharedkey>
+
+dpi nuget --output table report
+```

icon/LICENSE.md

@@ -1,21 +1,24 @@
 # Icon License
 
-Icon is not MIT licensed
-
 March 10, 2021
+*Icon is not MIT licensed*
+
+## ROYALTY–FREE LICENSE
 
-ROYALTY–FREE LICENSE
 Image: “investigation Icon #2048220”
 Purchased from Noun Project
 
-LICENSEE
+## LICENSEE
+
 Mattias Karlsson
 
-LICENSOR
+## LICENSOR
+
 The Noun Project, Inc.
 
-On behalf of
+## On behalf of
+
 [Made](https://thenounproject.com/elki)
 
-This license grants its holder perpetual, non-exclusive, worldwide rights to unlimited use of the licensed
+This license grants its **holder** perpetual, non-exclusive, worldwide rights to unlimited use of the licensed
 image, as covered by Noun Project's Terms of Use ([thenounproject.com/legal](https://thenounproject.com/legal/)).