Add sebdanielsson's template collection

Author: sebdanielsson

_data/collection-index.yml

@@ -966,7 +966,7 @@
   maintainer: ForWarD Software
   contact: https://github.com/forwardsoftware/devcontainer-features/issues
   repository: https://github.com/forwardsoftware/devcontainer-features
-  ociReference: ghcr.io/forwardsoftware/devcontainer-features 
+  ociReference: ghcr.io/forwardsoftware/devcontainer-features
 - name: devcontainer feature to install apt dependencies defined in an `Aptfile.dev` file.
   maintainer: Viktor Schmidt
   contact: https://github.com/viktorianer/devcontainer-features/issues
@@ -1017,3 +1017,8 @@
   contact: https://github.com/fardragon/devcontainers-zig-template/issues
   repository: https://github.com/fardragon/devcontainers-zig-template
   ociReference: ghcr.io/fardragon/devcontainers-zig-template
+- name: sebdanielsson's templates
+  maintainer: Sebastian Danielsson (@sebdanielsson)
+  contact: https://github.com/sebdanielsson/devcontainers/issues
+  repository: https://github.com/sebdanielsson/devcontainers
+  ociReference: http://ghcr.io/sebdanielsson/devcontainers