add jq

Dockerfile

@@ -2,7 +2,7 @@ FROM alpine:3.12.0
 
 ARG KUBECTL_VERSION=1.18.9
 
-RUN apk add --update --no-cache curl ca-certificates && \
+RUN apk add --update --no-cache curl ca-certificates jq && \
     curl -LO https://storage.googleapis.com/kubernetes-release/release/v${KUBECTL_VERSION}/bin/linux/amd64/kubectl && \
     mv kubectl /usr/bin/kubectl && \
     chmod +x /usr/bin/kubectl

README.md

@@ -1,3 +1,3 @@
 # kubectl
 
-minimal alpine-bsed image containing kubectl and curl
+minimal alpine-bsed image containing kubectl, jq and curl