improve env.md for install ZLMediaKit

doc/env.md

@@ -58,9 +58,11 @@ make -j8
 - then run `export DISPLAY=local_ip:0.0` (or add it to ~/.bashrc) on remote machine (linux server or embedded board)
 
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-Maybe you need install nginx with `http-rtmp-module` as rtmp server for debug purpose (other tools such as `ZLMediaKit` works fine). 
+Maybe you need install nginx with `http-rtmp-module` as rtmp server for debug purpose (other tools such as `ZLMediaKit` works fine **which was highly recommended**). Also, maybe you need a rtsp server from which we can receive rtsp stream for debug purpose.
 
-Also, maybe you need a rtsp server from which we can receive rtsp stream for debug purpose.
+- [how to install ZLMeidaKit](https://github.com/ZLMediaKit/ZLMediaKit/wiki/vcpkg%E6%96%B9%E5%BC%8F%E5%AE%89%E8%A3%85zlmediakit)
+- [how to push stream to ZLMediaKit](https://github.com/ZLMediaKit/ZLMediaKit/wiki/ZLMediaKit%E6%8E%A8%E6%B5%81%E6%B5%8B%E8%AF%95), a few samples which used `vp_rtmp_des_node` in VidepPipe would push rtmp stream to server.
+- [how to pull/play stream from ZLMediaKit](https://github.com/ZLMediaKit/ZLMediaKit/wiki/%E6%92%AD%E6%94%BEurl%E8%A7%84%E5%88%99), VLC player or ffplay was recommended.
 
 ## tips ##
 - Use shared_ptr/make_shared in whole project, do not use new/delete.