add

stress/Dockerfile

@@ -5,4 +5,4 @@ RUN apt-get update && apt-get install -y \
     stress \
     --no-install-recommends
 
-ENTRYPOINT [ "stress" ]
+CMD [ "stress" ]

ulimit/Dockerfile

@@ -0,0 +1,9 @@
+FROM debian:jessie
+MAINTAINER Jessica Frazelle <jess@docker.com>
+
+RUN apt-get update && apt-get install -y \
+    ulimit \
+    --no-install-recommends
+
+ENTRYPOINT [ "ulimit" ]
+CMD [ "-n" ]