Add NuGet package tools

tools/nuget/build.docker.ps1

@@ -0,0 +1,43 @@
+Param(
+    [Parameter(Position = 0)]
+    [string] $RID
+)
+
+$ErrorActionPreference = "Stop"
+
+if (-not $RID ) {
+    Write-Output "No RID specified, building all known RIDs"
+    ./build.docker.ps1 "alpine-x64"
+    ./build.docker.ps1 "debian-x64"
+    ./build.docker.ps1 "fedora-x64"
+    exit
+}
+
+$Image = $null
+$Shell = $null
+
+switch ($RID) {
+    'alpine-x64' { 
+        $Image = 'alpine' 
+        $Shell = '/bin/sh'
+    }
+    'debian-x64' { 
+        $Image = 'debian' 
+        $Shell = '/bin/bash'
+    }
+    'fedora-x64' { 
+        $Image = 'fedora' 
+        $Shell = '/bin/bash'
+    }
+    Default { 
+        Write-Error "Unknown Runtime Identifier $RID"
+        exit
+    }
+}
+
+Write-Host "Building $RID with image $Image using $Shell"
+
+$RepoRoot = (Get-Item (git rev-parse --show-toplevel)).FullName
+
+docker run --rm --mount "type=bind,source=$RepoRoot,destination=/csfml/" $Image $Shell -c "cd /csfml/tools/nuget/; ./docker.$RID.sh"
+exit $LastExitCode