Install mackup only on clients

Non-clients do not have access to my internal cloud folders
=> check if one of them exists or not to determine client vs. server

.local/share/dotfiles/setup.sh

@@ -41,6 +41,8 @@ if _command_exists pip; then
     # Ensure `pipx` is installed in the user's local environment
     pip install --upgrade --user pipx
 
+    if [ -d "$HOME/data/getraenkemarkt" ]; then
+
         # (Re-)Install `mackup` via `pipx` in the user's local environment
         export PIPX_BIN_DIR=$XDG_BIN_HOME
         export PIPX_HOME="$XDG_DATA_HOME/pipx"
@@ -54,6 +56,8 @@ if _command_exists pip; then
 
         $XDG_BIN_HOME/mackup restore
 
+    fi
+
 fi