Add configuration files for SRS SIP and update README with Docker commands

.gitignore

@@ -23,4 +23,5 @@
 hs_err_pid*
 objs
 .idea
-./run
+
+run

README_cross.md

@@ -1,4 +1,13 @@
+# note to me
 
 ```bash
 docker compose build --network host
 ```
+
+```
+docker compose up -d --force-recreate
+```
+
+# TODO
+
+- [ ] let user choose whether use mirror (use which mirror) when building Dockerfile 

docker-compose.yml

@@ -14,7 +14,10 @@ services:
       - ./run/conf/config.yaml:/usr/local/srs-sip/config.yaml:ro
       - ./run/logs:/usr/local/srs-sip/logs
       - ./run/srs/conf/srs.conf:/usr/local/srs/conf/srs.conf:ro
+      # use docker logs
       - ./run/srs/logs:/var/log/srs/
+      # for recording
+      - ./run/data:/data
     ports:
       # SRS RTMP
       - "1985:1985"