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

Dockerfile

@@ -1,11 +1,13 @@
-FROM golang:1.17 as builder
+FROM golang:1.20 as builder
 WORKDIR /go/src/app
 COPY . .
 RUN 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"]