Add NuGet package tools

tools/nuget/build.docker.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+# Automatically exit on error
+set -e
+
+if [[ -z "$1" ]]; then
+    echo 'No Runtime Identifier specified, running all known RIDs'
+    ./build.docker.sh "alpine-x64"
+    ./build.docker.sh "debian-x64"
+    ./build.docker.sh "fedora-x64"
+    exit 0
+fi
+
+RID="$1"
+
+case "$RID" in
+
+'alpine-x64')
+    Image='alpine'
+    Shell='/bin/sh'
+    ;;
+
+'debian-x64')
+    Image='debian'
+    Shell='/bin/bash'
+    ;;
+
+'fedora-x64')
+    Image='fedora'
+    Shell='/bin/bash'
+    ;;
+
+*)
+    echo "Unknown Runtime Identifier $RID"
+    exit 1
+    ;;
+
+esac
+
+echo "Building $RID using image $Image with $Shell"
+
+RepoRoot="$(realpath "$(git rev-parse --show-toplevel)")"
+
+docker run --rm --mount "type=bind,source=$RepoRoot,destination=/csfml/" "$Image" "$Shell" -c "cd /csfml/tools/nuget/; ./docker.$RID.sh"