11-Location的匹配规则解析

location / {
  root /home;
}

location = /img/4k.jpg {
  root /home;
}

location ~* \.(GIF|jpg|png) {
  root /home;
}

location ~ \.(GIF|jpg|png) {
  root /home;
}

location ^~ /img {
  root /home;
}