README up

README.md

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+## R API DEMO
+
+Investigate API Development with R - [plumber](https://github.com/trestletech/plumber), [Rserve](https://www.rforge.net/Rserve/) and [rApache](http://rapache.net/).
+
+### Docker
+
+```
+## build
+docker build -t=api ./api/.
+
+## run
+# rApache - 7000, Rserve - 8000, plumber - 9000
+# all APIs managed by supervisor
+docker run -d -p 7000:80 -p 8000:8000 -p 9000:9000 --name api api:latest
+```
+
+### CURL
+
+```
+# change port accordingly
+curl -H "Content-Type: application/json" -X POST -d '{"n": 10, "wait": 0.5}' http://localhost:7000/test
+```
+
+### Performance Test
+
+```
+## locust - only available for Python 2
+# pip install locustio
+
+locust -f ./locustfile.py --host http://localhost:7000 --no-web -c 1 -r 1
+```