fix(build) correct Dockerfile metadata paths

The metadata package was moved under the manager folder at some point,
but the Dockerfile was not updated. This updates the Dockerfile to use
the new path, to correctly populate tag/commit/etc. metadata in images.

Dockerfile

@@ -17,7 +17,7 @@ COPY internal/ internal/
 ARG TAG
 ARG COMMIT
 ARG REPO_INFO
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager -ldflags "-s -w -X github.com/kong/kubernetes-ingress-controller/v2/internal/metadata.Release=$TAG -X github.com/kong/kubernetes-ingress-controller/v2/internal/metadata.Commit=$COMMIT -X github.com/kong/kubernetes-ingress-controller/v2/internal/metadata.Repo=$REPO_INFO" ./internal/cmd/main.go
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager -ldflags "-s -w -X github.com/kong/kubernetes-ingress-controller/v2/internal/manager/metadata.Release=$TAG -X github.com/kong/kubernetes-ingress-controller/v2/internal/manager/metadata.Commit=$COMMIT -X github.com/kong/kubernetes-ingress-controller/v2/internal/manager/metadata.Repo=$REPO_INFO" ./internal/cmd/main.go
 
 ### FIPS 140-2 binary
 # Build the manager binary
@@ -44,7 +44,7 @@ RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager
 # Build a manager binary with debug symbols and download Delve
 FROM builder as builder-delve
 
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager-debug -gcflags=all="-N -l" -ldflags "-X github.com/kong/kubernetes-ingress-controller/v2/internal/metadata.Release=$TAG -X github.com/kong/kubernetes-ingress-controller/v2/internal/metadata.Commit=$COMMIT -X github.com/kong/kubernetes-ingress-controller/v2/internal/metadata.Repo=$REPO_INFO" ./internal/cmd/main.go
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -o manager-debug -gcflags=all="-N -l" -ldflags "-X github.com/kong/kubernetes-ingress-controller/v2/internal/manager/metadata.Release=$TAG -X github.com/kong/kubernetes-ingress-controller/v2/internal/manager/metadata.Commit=$COMMIT -X github.com/kong/kubernetes-ingress-controller/v2/internal/manager/metadata.Repo=$REPO_INFO" ./internal/cmd/main.go
 
 ### Debug
 # Create an image that runs a debug build with a Delve remote server on port 2345
@@ -61,6 +61,15 @@ CMD ["exec", "--continue", "--accept-multiclient",  "--headless", "--api-version
 # 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:nonroot AS distroless
+ARG TAG
+LABEL name="Kong Ingress Controller" \
+      vendor="Kong" \
+      version="$TAG" \
+      release="1" \
+      url="https://github.com/Kong/kubernetes-ingress-controller" \
+      summary="Kong for Kubernetes Ingress" \
+      description="Use Kong for Kubernetes Ingress. Configure plugins, health checking, load balancing and more in Kong for Kubernetes Services, all using Custom Resource Definitions (CRDs) and Kubernetes-native tooling."
+
 WORKDIR /
 COPY --from=builder /workspace/manager .
 USER 65532:65532