refactor: update to the latest version of kubebuilder and add support for hydra v2 (#127)

Dockerfile-kubebuilder

@@ -1,17 +1,17 @@
-FROM golang:1.16 as builder
+FROM golang:1.20 as builder
 WORKDIR /go/src/app
-RUN os=$(go env GOOS) &&\
-    arch=$(go env GOARCH) &&\
-    curl -sL https://github.com/kubernetes-sigs/kubebuilder/releases/download/v2.3.2/kubebuilder_2.3.2_${os}_${arch}.tar.gz | tar -xz -C /tmp/ &&\
-    mv /tmp/kubebuilder_2.3.2_${os}_${arch} /usr/local/kubebuilder &&\
-    export PATH=$PATH:/usr/local/kubebuilder/bin
+
+ENV PATH=$PATH:/go/src/app/.bin
+
 COPY . .
 RUN make test &&\
     make manager
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM gcr.io/distroless/static:latest
+FROM gcr.io/distroless/static:nonroot
+WORKDIR /
 COPY --from=builder /go/src/app/manager .
-USER 1000
+USER 65532:65532
+
 ENTRYPOINT ["/manager"]