Task: Git backup of workflows and credentials

n8n workflow JSON:
{"id":"15","name":"Tools / Backup Gitlab","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,400],"parameters":{},"typeVersion":1},{"name":"Export Workflows","type":"n8n-nodes-base.executeCommand","position":[450,300],"parameters":{"command":"npx n8n export:workflow --backup --output repo/workflows/"},"typeVersion":1},{"name":"Export Credentials","type":"n8n-nodes-base.executeCommand","position":[600,300],"parameters":{"command":"npx n8n export:credentials --backup --output repo/credentials/"},"typeVersion":1},{"name":"git add","type":"n8n-nodes-base.executeCommand","position":[750,300],"parameters":{"command":"git -C repo add ."},"typeVersion":1},{"name":"git commit","type":"n8n-nodes-base.executeCommand","position":[900,300],"parameters":{"command":"=git -C repo commit -m \"Auto backup ({{ new Date().toISOString() }})\""},"typeVersion":1},{"name":"git push","type":"n8n-nodes-base.executeCommand","position":[1050,300],"parameters":{"command":"git -C repo push"},"typeVersion":1},{"name":"Cron","type":"n8n-nodes-base.cron","position":[250,200],"parameters":{"triggerTimes":{"item":[{"hour":0},{"hour":12},{"hour":6},{"hour":18}]}},"typeVersion":1}],"active":true,"settings":{},"connections":{"Cron":{"main":[[{"node":"Export Workflows","type":"main","index":0}]]},"git add":{"main":[[{"node":"git commit","type":"main","index":0}]]},"git commit":{"main":[[{"node":"git push","type":"main","index":0}]]},"Export Workflows":{"main":[[{"node":"Export Credentials","type":"main","index":0}]]},"Export Credentials":{"main":[[{"node":"git add","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"Export Workflows","type":"main","index":0}]]}}}