Building Dockerfile results in missing protoc error

[hderms]

19.98 --- stderr
19.98 thread 'main' panicked at 'Could not find protoc installation and this build crate cannot proceed without
19.98 this knowledge. If protoc is installed and this crate had trouble finding
19.98 it, you can set the PROTOC environment variable with the specific path to your
19.98 installed protoc binary.If you're on debian, try apt-get install protobuf-compiler or download it from https://github.com/protocolbuffers/protobuf/releases

We can correct this by installing protobuf-compiler prior to running that command.