updated readme

README.md

@@ -1,3 +1,27 @@
 # sip-recorder
 
-docker container with an asterisk instance which replies to all calls and records them
+docker container with an asterisk instance which replies to all calls and records them
+
+## building
+```
+docker build -t sip-recorder .
+```
+
+## running
+```
+# first get your IP address
+IP=$(ip addr show eth0 |grep '^\s*inet\ ' | sed 's/.*inet\ \([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\).*/\1/')
+
+# then start the container
+docker run -d --name sip-recorder \
+-v "$PWD/recordings:/recordings" \
+-v "$PWD/recordings-csv:/var/log/asterisk/cdr-custom" \
+-p 5060:5060/udp -p 15000-15100:15000-15100/udp \
+-e "SIP_PASS=mypassword" \
+-e "SIP_USER=myuser" \
+-e "SIP_SERVER=sip.provider.com" \
+-e "EXTERNAL_IP=$IP" \
+sip-recorder
+
+```
+