content: FROM ubuntu:20.04
  
  ENV DEBIAN_FRONTEND=noninteractive
  
  RUN apt update && apt install -y build-essential curl
  
  ADD rust-toolchain /code/fuser/rust-toolchain
  
  RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain=$(cat /code/fuser/rust-toolchain)
  
  ENV PATH=/root/.cargo/bin:$PATH
  
  ADD . /code/fuser/
  