Add host-spawn.

Dockerfile

@@ -264,6 +264,7 @@ RUN apt-get update && \
     go install github.com/kvz/json2hcl@latest && \
     go install github.com/hashicorp/envconsul@latest && \
     go install sigs.k8s.io/kustomize/kustomize/v4@latest && \
+    go install github.com/1player/host-spawn@latest && \
     wget https://raw.githubusercontent.com/rabbitmq/rabbitmq-server/v3.8.16/deps/rabbitmq_management/bin/rabbitmqadmin -qO /usr/local/bin/rabbitmqadmin && \
     chmod +x /usr/local/bin/rabbitmqadmin && \
     mkdir /usr/local/share/bfg && \