moved cargo configuration file in arch builder image

arch-builder/Dockerfile

@@ -72,7 +72,7 @@ WORKDIR /home/luser
 
 FROM base AS rust
 RUN mkdir -p /etc/cargo
-COPY config.toml /etc/cargo/
+COPY config.toml /.cargo/
 RUN pacman -S --noconfirm --needed \
     rustup \
     sccache \
@@ -87,7 +87,6 @@ FROM rust-full AS rust-full-rootless
 USER luser
 WORKDIR /home/luser
 RUN mkdir .cargo
-RUN ln -s /etc/cargo/config.toml .cargo/config.toml
 RUN rustup toolchain install stable-x86_64-unknown-linux-gnu
 RUN rustup target add \
     x86_64-unknown-linux-musl \