Upgrade go version to 1.17 in Dockerfile

Upgrade go version in Dockerfile

Signed-off-by: Zheng Xi Zhou <zzxwill@gmail.com>

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.16 as builder
+FROM golang:1.17 as builder
 
 WORKDIR /workspace
 # Copy the Go Modules manifests
@@ -19,7 +19,7 @@ RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM golang:1.16
+FROM golang:1.17
 WORKDIR /
 COPY --from=builder /workspace/manager .
 #USER nonroot:nonroot