Add README.md

Author: sargunv

README.md

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+# PokeAPI Data 
+
+This repository contains:
+
+ - [data/api](data/api): a static copy of the JSON data generated with the above script
+ - [data/schema](data/schema): a static copy of the PokeAPI schema generated from the above data
+ - [updater](updater): a bot that runs in docker and can update the data stored in this repo
+
+You can manually update the data if necessary. See [the updater bot](updater).
+You can run the bot in docker, or read and adapt its update script yourself.