Fix grpc compilation issue in v0.3.0 image (#26)

Signed-off-by: Pavol Loffay <p.loffay@gmail.com>

Author: pavolloffay

Dockerfile

@@ -151,4 +151,5 @@ RUN apk add --no-cache bash libstdc++ && \
     ln -s /usr/bin/grpc_node_plugin /usr/bin/protoc-gen-grpc-js && \
     ln -s /usr/bin/grpc_python_plugin /usr/bin/protoc-gen-grpc-python
 COPY protoc-wrapper /usr/bin/protoc-wrapper
+ENV LD_LIBRARY_PATH='/usr/lib:/usr/lib64:/usr/lib/local'
 ENTRYPOINT ["protoc-wrapper", "-I/usr/include"]