First time participating in Advent of Code

This year I am going to participate in Advent of Code for the first time. I will try to solve all puzzles in Go.
What is Advent of Code?
From 1 to 25 December, two puzzles are available every day, to solve the big puzzle of this year. The riddles are set up in such a way that they can best be solved with a piece of code. For each puzzle you get your own unique input with one specific output every day.
You can register and participate via https://www.adventofcode.com.
Why in Go?
Since I am not that experienced in Go, Advent of Code seemed like a great opportunity to get better in Go.
Repo on GitHub
I created a GitHub repository where I will publish my answers of each puzzle.
You should not expect my code to have the best performance, but I will try my best to improve it.
Are you also doing Advent of Code this year? 🎄