Add helm and kubectl dependencies in the Dockerfile (#30)

Part of #19

Dockerfile

@@ -16,6 +16,13 @@ COPY cmd/main.go cmd/main.go
 COPY api/ api/
 COPY internal/controller/ internal/controller/
 
+## Download helm and kubectl
+RUN curl -LO "https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl" \
+    && chmod +x ./kubectl \
+    && mv ./kubectl /usr/local/bin/kubectl \
+    && curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 \
+    && chmod +x get_helm.sh && ./get_helm.sh
+
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command
 # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
@@ -28,6 +35,9 @@ RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o ma
 FROM gcr.io/distroless/static:nonroot
 WORKDIR /
 COPY --from=builder /workspace/manager .
+COPY --from=builder /usr/local/bin/kubectl /usr/local/bin/kubectl
+COPY --from=builder /usr/local/bin/helm /usr/local/bin/helm
+
 USER 65532:65532
 
 ENTRYPOINT ["/manager"]