Update README.md

README.md

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-# IspdbHandler
-
+# Ispdb Api Handler
+
+### About
+This is go-application for looking imap/pop3/smtp config from ISP DB by Mozilla (Thunderbird autoconfig) with local caching configs and web api.
+
+### Features
+
+Flags to execute
+--update-threads=100 - default 100 threads at the pool for downloader cache
+--port=37896 - port for api handler
+--update-cache=1 - need update cache from ISPDB mozilla
+
+Just get api request:
+-> localhost:37896/find/gmail.com
+You will get answer with json config OR message - Not Found!