add Dockerfile for ocm-kit command

Dockerfile

@@ -0,0 +1,36 @@
+# Build the manager binary
+FROM --platform=$BUILDPLATFORM golang:1.26 AS builder
+
+WORKDIR /workspace
+RUN go env -w GOMODCACHE=/root/.cache/go-build
+
+# Copy the Go Modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+# Cache deps before building and copying source so that we don't need to re-download as much
+# and so that source changes don't invalidate our downloaded layer
+RUN --mount=type=cache,target=/root/.cache/go-build go mod download
+
+# Copy the go source
+COPY cmd/ cmd/
+COPY compver/ compver/
+COPY helmvalues/ helmvalues/
+
+ARG TARGETOS
+ARG TARGETARCH
+
+RUN mkdir bin
+
+FROM builder AS ocm-kit-builder
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg \
+    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH GO111MODULE=on go build -ldflags="-s -w" -a -o bin/ocm-kit ./cmd/ocm-kit
+
+# Use distroless as minimal base image to package the binary
+# Refer to https://github.com/GoogleContainerTools/distroless for more details
+FROM gcr.io/distroless/static:nonroot AS ocm-kit
+WORKDIR /
+COPY --from=ocm-kit-builder /workspace/bin/ocm-kit .
+USER 65532:65532
+ENTRYPOINT ["/ocm-kit"]