docs: add README.md

README.md

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+# GeoLite2
+
+MaxMind's [GeoLite2](https://dev.maxmind.com/geoip/geoip2/geolite2/) Country, City, and ASN databases.
+
+## Download
+
+GeoLite2-ASN: [ASN.mmdb](https://github.com/dnomd343/GeoLite2/raw/download/ASN.mmdb)
+
+GeoLite2-City: [City.mmdb](https://github.com/dnomd343/GeoLite2/raw/download/City.mmdb)
+
+GeoLite2-Country: [Country.mmdb](https://github.com/dnomd343/GeoLite2/raw/download/Country.mmdb)
+
+For Chinese user, you can download following urls:
+
+```
+https://res.dnomd343.top/Share/GeoLite2/ASN.mmdb.xz
+https://res.dnomd343.top/Share/GeoLite2/City.mmdb.xz
+https://res.dnomd343.top/Share/GeoLite2/Country.mmdb.xz
+```
+
+## License
+
+Source Code MIT ©2022 [@dnomd343](https://github.com/dnomd343)
+
+Database and Contents Copyright (c) [MaxMind](https://www.maxmind.com/), Inc.