折腾 node 16.x => node 14.x

# 卸载
yum remove nodejs

# 清除 yum rpm 源
cd /etc/yum.repos.d
rm -rf nodesource-el7.repo

# 清除 yum rpm 源缓存
yum clean all
rm -rf /var/cache/yum

# 重新设置为 14.x yum rpm 源
curl --silent --location https://rpm.nodesource.com/setup_14.x | bash -

# 重新安装
yum install -y nodejs