add gen bindata shell

docs/genbindata.sh

@@ -0,0 +1,2 @@
+go-bindata -o internal/bindata/html/html.go -pkg binhtml  assets/html/
+go-bindata -o internal/bindata/geoip/geoip.go -pkg bingeoip  assets/GeoLite2-City.mmdb assets/flags.json