Glide 사용하기

* glide 이미지캐시 및 썸네일 사용하기

https://futurestud.io/tutorials/glide-network-dependent-image-loading

* gradle 속도 향상

https://developer.android.com/studio/run/index.html?hl=ko

https://www.liaohuqiu.net/posts/speed-up-your-build/