Updated the README with instructions

README.md

@@ -1,2 +1,36 @@
 # docker_nextepc
-Docker files to run NextEPC in a docker
+Docker files to build and run NextEPC in a docker
+
+Build Instructions
+------------------
+
+* Mandatory requirements:
+	* docker-ce              https://docs.docker.com/install/linux/docker-ce/ubuntu/
+
+
+Download and build docker image of NextEPC: 
+```
+cd ~ && git clone https://github.com/herlesupreeth/docker_nextepc
+cd nextepc
+docker build --force-rm -t nextepc:v0.1 .
+```
+
+Execution Instructions
+----------------------
+
+```
+cd ~/nextepc
+docker run --rm -it --cap-add=NET_ADMIN --env-file=docker_env --name epc --net=host --device /dev/net/tun --sysctl net.ipv4.ip_forward=1 nextepc:v0.1
+```
+Notes:
+	- --net=host is required in order to allow binding of ports in the container
+	- The container requires NET_ADMIN permission in order to create a tun interface
+
+Configuration:
+
+The following parameters can be modified in 'docker_env' file before running 'docker run' command to suit your Core Network deployment
+
+MCC				Mobile Country Code
+MNC				Mobile Network Code
+TAC1			Tracking Area Code
+EPC_IF			Network Interface name to bind SGW and MME