Image build is optimized.

.gitlab-ci.yml

@@ -62,4 +62,4 @@ deploy:
     - docker pull 22baar1mst/asyst-nlp-grader:latest
     - docker run -d 22baar1mst/asyst-nlp-grader:latest
   only:
-    - master
+    - master
\ No newline at end of file

flask_ml_api/Dockerfile

 FROM pytorch/pytorch:1.10.0-cuda11.3-cudnn8-runtime as build
 
 RUN apt-get update && apt-get install -y curl
-RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs -o rustup-init.sh
-RUN sh rustup-init.sh -y --default-toolchain none
-RUN ~/.cargo/bin/rustup toolchain install stable --profile minimal --no-self-update
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs -o /usr/local/bin/rustup-init.sh
+RUN /usr/local/bin/rustup-init.sh -y --default-toolchain none
+RUN /usr/local/bin/rustup toolchain install stable --profile minimal --no-self-update
 
-ENV PATH="$PATH:$HOME/.cargo/bin"
-
-RUN rustup --version
-RUN cargo --version
+RUN /usr/local/bin/rustup --version
+RUN /usr/local/bin/cargo --version
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential python3-venv && \