feat: add deploy webhook endpoint (POST /api/v1/_deploy)

deploy.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+echo "[deploy] pulling latest code..."
+git pull origin master
+
+echo "[deploy] building..."
+go build -o tutor-api ./cmd/tutor-api
+
+echo "[deploy] restarting service..."
+sudo systemctl restart tutor-api
+
+echo "[deploy] done"