feat: recovery shell script 추가

recovery.sh

+#!bin/bash
+FILE_NAME="charger"
+SERVICE_FILE="/etc/systemd/system/${FILE_NAME}.service"
+
+USER_NAME="pi"
+
+EXEC_PATH="$(pwd)/${FILE_NAME}"
+
+cat <<EOF | sudo tee $SERVICE_FILE > /dev/null
+[Unit]
+Description=Charger
+After=network.target
+
+[Service]
+ExecStart=$EXEC_PATH
+Restart=always
+RestartSec=5s
+User=$USER_NAME
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+sudo systemctl daemon-reload
+sudo systemctl enable ${FILE_NAME}.service
+sudo systemctl start ${FILE_NAME}.service
+sudo systemctl status ${FILE_NAME}.service