added readme

README.md

+# Fedi block API
+
+Used to see which instances block yours.
+
+## software used:
+- python 3.10.2
+- node v17.6.0
+- yarn 1.22.17
+
+## how to use:
+
+Copy the preloaded database to the live database
+
+`cp blocks_preloaded.db blocks.db`
+
+Start the mastodon API
+
+```
+cd mastodon_api
+yarn install
+node .
+```
+
+Fill the database with blocks.
+
+`python fetch_blocks.py`
+
+## License
+
+[AGPLv3+NIGGER](https://plusnigger.autism.exposed/)
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