add README.md

README.md

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+## server
+
+### nodemon 설치
+```
+npm install -g nodemon
+```
+
+### server 실행
+```
+node server/server.js
+or
+(nodemon 설치됐을 경우)
+nodemon server/server.js
+```
+
+### log파일 생성
+```
+nodemon server/server.js >> server/log.log
+```
+
+### log view
+```
+tail -f server/log.log
+```
+
+## client
+### simple webserver 실행
+```
+python webstart.py
+```
+
+### web browser
+```
+localhost:8080?ch=[channel]
+```