Install rust via official rustup

Author: morr0ne

Dockerfile

@@ -1,6 +1,4 @@
 FROM archlinux:base-devel
 
-RUN pacman --noconfirm -Syu && pacman --needed --noconfirm -S rustup libinput
-RUN pacman -Scc --noconfirm
-
-RUN rustup toolchain install stable
+RUN pacman --noconfirm -Syu && pacman --needed --noconfirm -S libinput && pacman -Scc --noconfirm
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain stable --no-modify-path