feat(deploy) : add maintenance mode with automatic toggle during deploy

deploy/docker/deploy.sh

@@ -8,6 +8,9 @@ export SIRH_IMAGE_TAG="$TAG"
 
 echo "==> Deploying sirh:${TAG}..."
 
+echo "==> Enabling maintenance mode..."
+touch maintenance.on
+
 echo "==> Pulling image..."
 docker compose pull
 
@@ -24,5 +27,8 @@ echo "==> Clearing cache..."
 docker compose exec -T -u www-data app php bin/console cache:clear --env=prod
 docker compose exec -T -u www-data app php bin/console cache:warmup --env=prod
 
+echo "==> Disabling maintenance mode..."
+rm -f maintenance.on
+
 VERSION=$(docker compose exec -T app cat config/version.yaml | grep 'app.version' | awk -F"'" '{print $2}')
 echo "==> Deployed v${VERSION}"