How to find Maclaurin series of $y={(1+x)}^{1/x}$ at $x=0$?

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How to find Maclaurin series of $y={(1+x)}^{1/x}$ at $x=0$ ?

I can't find it when it comes to $f'(0), f''(0)$. I have used limit, but somehow I don't know what to do with the $\frac{1}{x}$ term.