adding kubectl versions to support overrides to Dockerfile

Author: dustinvanbuskirk

Dockerfile

@@ -2,8 +2,12 @@ FROM alpine:3.6 AS builder
 
 RUN apk update && apk add curl
 
-RUN curl -o kubectl1.14 -L https://storage.googleapis.com/kubernetes-release/release/v1.14.0/bin/linux/amd64/kubectl
+RUN curl -o kubectl1.14 -L https://storage.googleapis.com/kubernetes-release/release/v1.16.0/bin/linux/amd64/kubectl
 RUN curl -o kubectl1.15 -L https://storage.googleapis.com/kubernetes-release/release/v1.15.0/bin/linux/amd64/kubectl
+RUN curl -o kubectl1.14 -L https://storage.googleapis.com/kubernetes-release/release/v1.14.0/bin/linux/amd64/kubectl
+RUN curl -o kubectl1.13 -L https://storage.googleapis.com/kubernetes-release/release/v1.13.0/bin/linux/amd64/kubectl
+RUN curl -o kubectl1.12 -L https://storage.googleapis.com/kubernetes-release/release/v1.12.0/bin/linux/amd64/kubectl
+RUN curl -o kubectl1.11 -L https://storage.googleapis.com/kubernetes-release/release/v1.11.0/bin/linux/amd64/kubectl
 RUN curl -o kubectl1.10 -L https://storage.googleapis.com/kubernetes-release/release/v1.10.0/bin/linux/amd64/kubectl
 RUN curl -o kubectl1.6 -L https://storage.googleapis.com/kubernetes-release/release/v1.6.0/bin/linux/amd64/kubectl
 
@@ -13,12 +17,16 @@ FROM alpine:3.6
 RUN apk add --update bash
 
 #copy all versions of kubectl to switch between them later.
+COPY --from=builder kubectl1.16 /usr/local/bin/
 COPY --from=builder kubectl1.15 /usr/local/bin/
 COPY --from=builder kubectl1.14 /usr/local/bin/
+COPY --from=builder kubectl1.13 /usr/local/bin/
+COPY --from=builder kubectl1.12 /usr/local/bin/
+COPY --from=builder kubectl1.11 /usr/local/bin/
 COPY --from=builder kubectl1.10 /usr/local/bin/kubectl
 COPY --from=builder kubectl1.6 /usr/local/bin/
 
-RUN chmod +x /usr/local/bin/kubectl /usr/local/bin/kubectl1.6 /usr/local/bin/kubectl1.14 /usr/local/bin/kubectl1.15
+RUN chmod +x /usr/local/bin/kubectl /usr/local/bin/kubectl1.6 /usr/local/bin/kubectl1.11 /usr/local/bin/kubectl1.12 /usr/local/bin/kubectl1.13 /usr/local/bin/kubectl1.14 /usr/local/bin/kubectl1.15 /usr/local/bin/kubectl1.16
 
 WORKDIR /