add libprotobuf-dev as per tonic recommendations

https://github.com/hyperium/tonic#dependencies
for #112

Signed-off-by: clux <sszynrae@gmail.com>

Author: clux

Dockerfile

@@ -31,6 +31,7 @@ RUN apt-get update && apt-get install -y \
   autoconf \
   libtool \
   protobuf-compiler \
+  libprotobuf-dev \
   --no-install-recommends && \
   rm -rf /var/lib/apt/lists/*