Add the configuration for the path of geoip and geosite. (#57)

* Update README.md

* Update README.zh.md

* Update README.ja.md

* minor tweaks

---------

Co-authored-by: Toby <tobyxdd@gmail.com>

README.md

@@ -80,6 +80,12 @@ workers:
   tcpMaxBufferedPagesTotal: 4096
   tcpMaxBufferedPagesPerConn: 64
   udpMaxStreams: 4096
+
+# The path to load specific local geoip/geosite db files.
+# If not set, they will be automatically downloaded from https://github.com/Loyalsoldier/v2ray-rules-dat
+# geo:
+#   geoip: geoip.dat
+#   geosite: geosite.dat
 ```
 
 ### Example rules