devcontainer fixes (#688)

* adding runargs section to fix docker access from devcontainer to host

* updating integrated terminal settings to match with the most recent settings.json scheme

* updating base image to most recent dotnet sdk version

Co-authored-by: Steve Smith <steve@kentsmiths.com>

.devcontainer/Dockerfile

@@ -5,6 +5,7 @@
 #-------------------------------------------------------------------------------------------------------------
 FROM mcr.microsoft.com/dotnet/sdk:7.0
 
+
 # This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
 # property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
 # will be updated to match your local UID/GID (when using the dockerFile property).