(#3) paralax: add apckage signing

src/Paralax/scripts/build-and-pack.sh

@@ -16,13 +16,31 @@ echo "Package created for branch $GITHUB_REF_NAME"
 
 case "$GITHUB_REF_NAME" in
   "dev")
-    echo "Uploading Paralax package to NuGet..."
+    echo "Preparing to sign the package for NuGet upload..."
     PACKAGE_PATH="./nupkg/Paralax.$PACKAGE_VERSION.nupkg"
 
     if [ -f "$PACKAGE_PATH" ]; then
       echo "Package found: $PACKAGE_PATH"
-      dotnet nuget push "$PACKAGE_PATH" -k "$NUGET_API_KEY" -s https://api.nuget.org/v3/index.json
-      echo "Package uploaded to NuGet."
+
+      echo "Signing the package..."
+      signtool sign /fd SHA256 /a /t http://timestamp.digicert.com /v "$PACKAGE_PATH"
+
+      if [ $? -eq 0 ]; then
+        echo "Package successfully signed."
+
+        echo "Uploading the signed Paralax package to NuGet..."
+        dotnet nuget push "$PACKAGE_PATH" -k "$NUGET_API_KEY" -s https://api.nuget.org/v3/index.json
+
+        if [ $? -eq 0 ]; then
+          echo "Package uploaded to NuGet."
+        else
+          echo "Error uploading the package to NuGet."
+          exit 1
+        fi
+      else
+        echo "Error signing the package."
+        exit 1
+      fi
     else
       echo "Error: Package $PACKAGE_PATH not found."
       exit 1