README to build pirserver and pirclient modules

README.md

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+To build the pirserver and pirclient modules:
+
+1) Clone the piros/Scripts repository (https://git-crysp.uwaterloo.ca/piros/Scripts) and build the dockers in it following instructions in that repository.
+2) Build the pirserver docker with ./built_dockers.sh
+3) docker run --device /dev/isgx -it zt_docker bash -c "start-aesmd && exec bash"