removed ENV subst

Dockerfile

@@ -1,9 +1,5 @@
 FROM alpine
 
-RUN apk add --update libintl && \
-    apk add --virtual build_deps gettext &&  \
-    cp /usr/bin/envsubst /usr/local/bin/envsubst && \
-    apk del gettext
 RUN mkdir /root/.kube
 ADD https://storage.googleapis.com/kubernetes-release/release/v1.4.1/bin/linux/amd64/kubectl /usr/local/bin/kubectl
 RUN chmod a+x /usr/local/bin/kubectl

README.md

@@ -1,8 +1,5 @@
 ### kubectl
 
-Contains the kubectl command for running against kubernetes.
-
-This also contains envsbst for setting up the `~/.kube/config` by injecting
-environment variables. This allows for injection of secrets into the config
-file without the secrets being shown in plain text, allowing them to be part
-of a CI/CD pipeline who's output is visible.
+contains:
+- kubectl for executing kubernetes commands
+- the `~/.kube/` directory