Find a conformal map from the exterior of the closed unit disk to the unit disk

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Question: Find a conformal map from the exterior of the closed unit disk to the unit disk. Also, prove that it is indeed a conformal map (bijective and holomorphic along with its inverse).

I missed that the two days we covered conformal mapping due to chaos in my life. I have been trying to find worked out examples and have been reading up to get some insight, but I am lost since I can't find something that details a complete worked out problem.

p.s. If anyone knows a great resource that would help me out to further my grasp of conformal maps in complex analysis it'd be much appreciated if you could disclose this.

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If you are working on $\mathbb{C}$, there is no such map (the exterior of the disc is not simply connected). If you're working on the Riemann sphere, investigate the mapping properties of $1/z$.