Create a Docker Build for Meowth 2

[wattazoum]

Hi,

Wanting to run my own instance of this bot, I found it handy to create a docker image of it.

I had to change the directory for the config.json, the serverdict and serverdict_backup and the raid_info.json files.

These files are supposed to be on an external directory and not in the image. That's why I created a config directory where they reside.

Note: the raid_info.json has a default version packaged inside the image (just like before)
but when the owner changes it, the new version is saved in the config directory

Have fun.