Base Docker image on debian:buster-slim

Dockerfile

@@ -1,11 +1,25 @@
-FROM rust:1.34.0-slim
+FROM debian:buster-slim
 
 RUN apt-get update
 RUN apt-get install -y clang cmake
 RUN apt-get install -y libsnappy-dev
+RUN apt-get install -y curl
 
 RUN adduser --disabled-login --system --shell /bin/false --uid 1000 user
 
+ARG RUST_VERSION=1.34.0
+ENV RUSTUP_HOME /usr/local/rustup
+ENV CARGO_HOME /usr/local/cargo
+ENV PATH $CARGO_HOME/bin:$PATH
+
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- \
+  -y \
+  --verbose \
+  --profile minimal \
+  --default-toolchain $RUST_VERSION
+
+RUN chmod -R a+w $RUSTUP_HOME $CARGO_HOME
+
 USER user
 WORKDIR /home/user
 COPY ./ /home/user