Fix wrong release path

Signed-off-by: Valerian Saliou <valerian@valeriansaliou.name>

Author: valeriansaliou

Dockerfile

@@ -6,13 +6,13 @@ RUN apt-get install -y build-essential clang
 WORKDIR /app
 COPY . /app
 RUN cargo clean && cargo build --release --target x86_64-unknown-linux-gnu
-RUN strip ./target/release/sonic
+RUN strip ./target/x86_64-unknown-linux-gnu/release/sonic
 
 FROM debian:buster-slim
 
 WORKDIR /usr/src/sonic
 
-COPY --from=build /app/target/release/sonic /usr/local/bin/sonic
+COPY --from=build /app/target/x86_64-unknown-linux-gnu/release/sonic /usr/local/bin/sonic
 
 CMD [ "sonic", "-c", "/etc/sonic.cfg" ]