move asdf install to install.

Author: RossBugginsNHS

src/devcontainers/base/src/.devcontainer/nhsnotify/install.sh

@@ -5,5 +5,7 @@ cp ./poststartcommand.sh /poststartcommand.sh
 cp ./welcome.sh /welcome.sh
 cp ./Makefile /Makefile
 
+source ~/.zshrc
+echo "go is at $(which go)"
 echo 'install asdf via go'
 go install github.com/asdf-vm/asdf/cmd/asdf@v0.18.0