tried to solve a problem on MLE of the this type below;

to find the MLE of $\displaystyle \theta $

$\displaystyle f(x;\theta) = \theta x^{\theta-1} $ $\displaystyle 0<x<1, 0<\theta<\infty $

$\displaystyle L(x;\theta) = \prod_{i=1}^{n}\theta x^{\theta-1} $

if i were to take the In of the above, how will the next step look like? cause am confuse here

thanks