Add rust support to naev-release.

naev-release/Dockerfile

@@ -1,5 +1,5 @@
 # Build luarocks in build container to save space.
-FROM registry.fedoraproject.org/fedora-minimal:latest AS build 
+FROM registry.fedoraproject.org/fedora-minimal:latest AS build
 
 WORKDIR /tmp
 # Install luarocks deps
@@ -37,12 +37,17 @@ ENV PATH "$PATH:/opt/butler"
 # Add rcodesign to PATH
 ENV PATH "$PATH:/opt/apple-codesign"
 
+# Add cargo to PATH
+ENV PATH "$PATH:/root/.cargo/bin"
+
 WORKDIR /tmp
 # Install utilities
 RUN microdnf --nodocs --setopt=install_weak_deps=0 -y install meson ninja-build gcc python3-pyyaml file git tar xz unzip zip \
 # Install SteamCMD and friends
     glibc.i686 SDL2.i686 && \
     microdnf clean all && \
+# Install Rust
+    curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain stable -y && \
 # Download and install SteamCMD
     curl -L -O http://media.steampowered.com/installer/steamcmd_linux.tar.gz && \
     mkdir -p /opt/steamcmd && \