Update Dockerfile

Dockerfile

@@ -18,13 +18,7 @@ RUN if [ $TARGETARCH = "amd64" ]; then \
 RUN rustup target add $(cat /tmp/arch)-unknown-linux-musl
 
 COPY . .
-RUN --mount=type=cache,target=/src/builder/target/ if [ &TARGETARCH = "arm64" ]; then \
-        CC_aarch64_unknown_linux_musl=clang;
-        AR_aarch64_unknown_linux_musl=llvm-ar; \
-        CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-Clink-self-contained=yes -Clinker=rust-lld"; \
-    fi \
-    cargo build --target=$(cat /tmp/arch)-unknown-linux-musl --release && \
-    cp target/$(cat /tmp/arch)-unknown-linux-musl/release/expander /tmp/expander
+RUN --mount=type=cache,target=/src/builder/target/ bash build.sh
 
 FROM scratch