Fix docker build

Author: alexcrichton

Dockerfile

@@ -22,3 +22,9 @@ RUN curl -sSLO https://github.com/Kitware/CMake/releases/download/v3.25.1/cmake-
   && mkdir -p /opt \
   && mv cmake-3.25.1-linux-x86_64 /opt/cmake
 ENV PATH /opt/cmake/bin:$PATH
+
+ENV CARGO_HOME=/opt/rust/cargo \
+  RUSTUP_HOME=/opt/rust/rustup \
+  PATH=$PATH:/opt/rust/cargo/bin
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
+  sh -s -- --default-toolchain 1.76.0 -y --profile minimal