update dockerfile to use pipeline build artifact

Dockerfile

-# NOTE: USING THIS IMAGE UNTIL registry1 credentials are added to IL2 runners
-# Build the manager binary
-FROM registry.il2.dso.mil/platform-one/devops/pipeline-templates/valkyrie/golang-builder-1.16:1.1 as builder
-# note: Adam tried to use GOMODCACHE env variable to pull in go cache 
-#       it worked locally but not with buildah.
-WORKDIR /workspace
-# Copy the Go Modules manifests
-COPY go.mod go.sum ./
-COPY main.go main.go driver.go driver.go ./
-COPY apis/ apis/
-COPY config/ config/
-COPY custom/ custom/
-COPY resources/ resources/
-COPY controllers/ controllers/
-COPY clients/ clients/
-# RUN chmod 755 go.sum
-# download with json logging
-# RUN go mod download -json
-RUN go mod download
-
-# Build
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager main.go driver.go
-
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
 FROM registry.il2.dso.mil/platform-one/devops/pipeline-templates/valkyrie/harden-valkyrie-python39:1.0
 WORKDIR /app
-COPY --from=builder /workspace/manager .
-COPY --from=builder /workspace/resources resources
+COPY .gobuild/bin/ .
 USER appuser
 
 # run interactively `docker run -it --entrypoint bash IMAGE_NAME`