BAARC-98: add grpc health probe to Dockerfile

Dockerfile

@@ -1,13 +1,18 @@
 FROM ubuntu:latest
 
-RUN apt-get update && apt-get install ca-certificates -y && apt-get clean && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install ca-certificates wget -y && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 COPY ./build/arc_linux_amd64 /service/arc
 
 WORKDIR /service
 
+# Add grpc_health_probe
+RUN GRPC_HEALTH_PROBE_VERSION=v0.4.24 && \
+    wget -qO/bin/grpc_health_probe https://github.com/grpc-ecosystem/grpc-health-probe/releases/download/${GRPC_HEALTH_PROBE_VERSION}/grpc_health_probe-linux-amd64 && \
+    chmod +x /bin/grpc_health_probe
+
 RUN chmod +x arc
 
 EXPOSE 9090
 
-CMD ["/service/arc"]
+CMD ["/service/arc"]