Add protobuf compiler to Dockerfile
The protobuf compiler (protoc) is required by build.rs.
@@ -4,7 +4,8 @@ RUN apt-get update && \
apt-get install -y \
curl \
unzip \
- gcc
+ gcc \
+ protobuf-compiler
RUN curl https://sh.rustup.rs -sSf > /usr/bin/rustup-init && \
chmod +x /usr/bin/rustup-init && \
