Add dotnet-node

Author: sebdanielsson

_data/collection-index.yml

@@ -962,3 +962,8 @@
   contact: https://github.com/davzucky/devcontainers-features-wolfi/issues
   repository: https://github.com/davzucky/devcontainers-features-wolfi
   ociReference: ghcr.io/davzucky/devcontainers-features-wolfi  
+- name: .NET + Node.js (dotnet-node)
+  maintainer: Sebastian Danielsson (@sebdanielsson)
+  contact: https://github.com/sebdanielsson/devcontainers/issues
+  repository: https://github.com/sebdanielsson/devcontainers
+  ociReference: http://ghcr.io/sebdanielsson/devcontainers