container: completion.bash: set xtrace if debug enabled

container/src/finance/completion.bash

@@ -17,6 +17,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
+[ "$DOCKER_FINANCE_DEBUG" == true ] && set -xv
 [ -z "$DOCKER_FINANCE_CONTAINER_FLOW" ] && exit 1
 
 function docker-finance::completion()