sys: update versions

 - kube: 1.11
 - kustomize: 1.0.4
 - alpine: 3.8

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.7
+FROM alpine:3.8
 
 ENV GOPATH=/go
 
@@ -9,8 +9,8 @@ COPY static/ /static/
 
 RUN \
  apk --no-cache add curl ca-certificates git go musl-dev && \
- curl -sSL -o /usr/local/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/v1.10.4/bin/linux/amd64/kubectl && \
- curl -sSL -o /usr/local/bin/kustomize https://github.com/kubernetes-sigs/kustomize/releases/download/v1.0.3/kustomize_1.0.3_linux_amd64 && \
+ curl -sSL -o /usr/local/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/v1.11.0/bin/linux/amd64/kubectl && \
+ curl -sSL -o /usr/local/bin/kustomize https://github.com/kubernetes-sigs/kustomize/releases/download/v1.0.4/kustomize_1.0.4_linux_amd64 && \
  chmod +x /usr/local/bin/kubectl && \
  chmod +x /usr/local/bin/kustomize && \
  go get -t ./... && \