run as non-root (newrelic#16)

Author: cristianciutea

Dockerfile

@@ -3,7 +3,6 @@ FROM alpine:latest
 # This makes it easy to build tagged images with different `kubectl` versions.
 ARG KUBECTL_VERSION="v1.13.0"
 
-USER root
 RUN apk add --update openssl
 RUN wget https://storage.googleapis.com/kubernetes-release/release/$KUBECTL_VERSION/bin/linux/amd64/kubectl \
     && chmod +x ./kubectl && mv ./kubectl /usr/local/bin/kubectl
@@ -13,4 +12,6 @@ RUN chmod +x /app/generate_certificate.sh
 
 WORKDIR /app
 
+USER 1000
+
 CMD ["./generate_certificate.sh"]