API：附近潛店改成座標查詢

[anntsai2356]

附近潛店改成利用經緯度座標查詢

[lukechu1997]

@anntsai2356 @yinmin8610
radius search is done
GET: https://b90a3314.ngrok.io/api/spot/{id}
return JSON with shop name, id, and distance
close this issue when this function is tested, thx.

[anntsai2356]

@lukechu1997
Could u update the URL ?
It can't work now. TT

[anntsai2356]

已測試，可以出現結果，但程式碼的正確性待驗證。

What "r" means in the code below ?
AND '.$long.' + '.$radius.'/(69 * COS(RADIANS('.$lat.'))))r

We should ask BlueT.