Dev Containers: Update onCreateCommand

- Pre-create user's workspaces folder

.devcontainer/scripts/usr/local/bin/onCreateCommand.sh

@@ -7,6 +7,7 @@ set -e
 mkdir -p "$HOME/.cabal/bin"
 mkdir -p "$HOME/.local/bin"
 mkdir -p "$HOME/projects"
+mkdir -p "$HOME/workspaces"
 
 # Copy scripts from skeleton directory if home directory is bind mounted
 if [ ! -f "$HOME/.local/bin/checkForUpdates.sh" ]; then