Created Migrate from V1 to V2 (markdown)

Migrate-from-V1-to-V2.md

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+You're probably here because you just updated the docker container and realized it's no longer working.
+This is because the config file, and the way this application connects to your devices has changed.
+
+## The changes
+
+- iSponsorBlockYT now supports every YouTube TV client, not just the Apple TV one. This means that you can now use this with many other devices, like smart TV's and consoles.
+- Your target device and server don't have to be on the same network anymore. This now works over the internet.
+- The config file has changed. You will need to update it (you can do it with the help of the new configurator tool)
+- A YouTube API key is now only required if you want to use the channel whitelist feature. If you don't want to use it, you can leave it blank.
+
+## How to migrate
+## _Warning: you'll need to add ALL your devices again since the method of connecting to them has changed._
+### 1.1 Using the new graphical configurator tool:
+You can use the graphical setup wizard (powered by [textual](https://github.com/Textualize/textual)).
+It will guide you through the process of setting up the new config file.
+Docker users can run it with the following command:
+```Shell
+docker run --rm -it \
+-v /PATH_TO_YOUR_CONFIG.json:/app/config.json \
+ghcr.io/dmunozv04/isponsorblocktv \
+--setup
+```
+### 1.2 Using the cli configurator tool:
+Docker users can run it with the following command:
+```Shell
+docker run --rm -it \
+-v /PATH_TO_YOUR_CONFIG.json:/app/config.json \
+ghcr.io/dmunozv04/isponsorblocktv \
+--setup-cli
+```
+### 2 Run the container:
+The container doesn't need the `--net=host` flag anymore, so you can run it like this:
+```Shell
+docker run -d \
+--name iSponsorBlockTV \
+--restart=unless-stopped \
+-v /PATH_TO_YOUR_CONFIG.json:/app/config.json \
+ghcr.io/dmunozv04/isponsorblocktv
+```