You are given an integer array `height` of length `n`. There are `n` vertical lines drawn such that the two endpoints of the `i`th line are `(i, 0)` and `(i, height[i])`.
Find two lines that, together with the x-axis, form a container that holds the most water. Return *the maximum amount of water a container can store*.
Example 1
Input: height = [1,8,6,2,5,4,8,3,7]
Output: 49
Explanation: The max area of water the container can contain is 49.