diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..9089a19
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,2 @@
+target/
+.git/
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index b497eff..5fa0561 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 /target
 /.env
-/service-account-cafecoder.json
\ No newline at end of file
+/service-account-cafecoder.json
+.DS_Store
+/.vscode
\ No newline at end of file
diff --git a/.hadolint.yaml b/.hadolint.yaml
new file mode 100644
index 0000000..3f3ff3a
--- /dev/null
+++ b/.hadolint.yaml
@@ -0,0 +1,4 @@
+ignored:
+  - DL3008
+  - DL3003
+  - DL4006
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index b8b1982..e8cc972 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,163 +1,177 @@
-# Ubuntu:20.04(amd64)
-# m1 mac だとハッシュを指定しないと arm64 で build してしまうので・・。
-FROM ubuntu@sha256:e3d7ff9efd8431d9ef39a144c45992df5502c995b9ba3c53ff70c5b52a848d9c
+FROM rust:1.57.0 AS build
+
+WORKDIR /work
+COPY . /work
+RUN cargo build --release
+
+FROM ubuntu:20.04
 
 ENV TZ Asia/Tokyo
 ENV DEBIAN_FRONTEND=noninteractive
 
-SHELL ["/bin/bash", "-c"]
+RUN sed -i -e 's/archive.ubuntu.com/jp.archive.ubuntu.com/g' /etc/apt/sources.list
 
-# install compilers
 RUN \
-    apt update && apt install -y \
+    apt-get update && apt-get install -y --no-install-recommends \
         software-properties-common \
         apt-transport-https \
         dirmngr \
         curl \
-        wget \
         time \
         iproute2 \
         build-essential \
+        apt-utils \
         sudo \
         unzip \
-        git
+        git \
+        gnupg \
+        libssl-dev \
+        ca-certificates \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Raku install
-RUN apt-get install -y rakudo
+RUN \
+    apt-get update && apt-get install -y --no-install-recommends \
+        rakudo \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
    
 # C#(mono) install
-RUN apt install gnupg ca-certificates -y && \
-    yes | apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF && \
-    echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | tee /etc/apt/sources.list.d/mono-official-stable.list && \
-    apt update && \
-    apt install mono-devel -y
+RUN \
+    yes | apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF \
+    && echo "deb https://download.mono-project.com/repo/ubuntu stable-focal main" | tee /etc/apt/sources.list.d/mono-official-stable.list \
+    && apt-get update && apt-get install -y --no-install-recommends \
+        mono-devel \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # C#(.NET) install
-RUN wget https://download.visualstudio.microsoft.com/download/pr/820db713-c9a5-466e-b72a-16f2f5ed00e2/628aa2a75f6aa270e77f4a83b3742fb8/dotnet-sdk-5.0.100-linux-x64.tar.gz && \
-    mkdir -p $HOME/dotnet && tar zxf dotnet-sdk-5.0.100-linux-x64.tar.gz -C $HOME/dotnet && \
-    echo 'export DOTNET_ROOT=$HOME/dotnet' >> ~/.profile && \
-    echo 'export PATH=$PATH:$HOME/dotnet' >> ~/.profile
+RUN \
+    curl -OL https://download.visualstudio.microsoft.com/download/pr/820db713-c9a5-466e-b72a-16f2f5ed00e2/628aa2a75f6aa270e77f4a83b3742fb8/dotnet-sdk-5.0.100-linux-x64.tar.gz \
+    && mkdir -p "$HOME/dotnet" \
+    && tar zxf dotnet-sdk-5.0.100-linux-x64.tar.gz -C "$HOME/dotnet" \
+    && rm dotnet-sdk-5.0.100-linux-x64.tar.gz
+ENV DOTNET_ROOT="/root/dotnet"
+ENV PATH="${PATH}:/root/dotnet"
 
 # C/C++ install
-RUN apt-get install g++-10 gcc-10 -y
+RUN \
+    apt-get update && apt-get install -y --no-install-recommends \
+        g++-10 \
+        gcc-10 \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Java11 install
-RUN apt install default-jdk -y
+RUN \
+    apt-get update && apt-get install -y --no-install-recommends \
+        default-jdk \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Python3 install
-RUN apt install python3.9 -y
+RUN \
+    apt-get update && apt-get install -y --no-install-recommends \
+        python3.9 \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 # Pypy3 install
-RUN cd /opt && \
-    wget https://downloads.python.org/pypy/pypy3.7-v7.3.3-linux64.tar.bz2 && \
-    tar xf pypy3.7-v7.3.3-linux64.tar.bz2 && \
-    cd /bin && \
-    ln -s /opt/pypy3.7-v7.3.3-linux64/bin/pypy3 pypy3
+RUN \
+    cd /opt \
+    && curl -OL https://downloads.python.org/pypy/pypy3.7-v7.3.3-linux64.tar.bz2 \
+    && tar xf pypy3.7-v7.3.3-linux64.tar.bz2 \
+    && cd /bin \
+    && ln -s /opt/pypy3.7-v7.3.3-linux64/bin/pypy3 pypy3 \
+    && cd /opt \
+    && rm pypy3.7-v7.3.3-linux64.tar.bz2
 
 # go install
-RUN wget https://golang.org/dl/go1.15.5.linux-amd64.tar.gz && \
-    tar -C /usr/local -xzf go1.15.5.linux-amd64.tar.gz && \
-    echo 'export PATH=$PATH:/usr/local/go/bin' >> ~/.profile
-
-ENV USER=$USER
+RUN \
+    curl -OL https://golang.org/dl/go1.15.5.linux-amd64.tar.gz \
+    && tar -C /usr/local -xzf go1.15.5.linux-amd64.tar.gz \
+    && rm go1.15.5.linux-amd64.tar.gz
+ENV PATH="${PATH}:/usr/local/go/bin"
     
 # Rust install
-RUN curl https://sh.rustup.rs -sSf | sh -s -- -y && \
-    source $HOME/.cargo/env && \
-    cargo new rust_workspace && \
-    cd rust_workspace &&\
-    wget https://raw.githubusercontent.com/cafecoder-dev/language-update/20.10/Rust/Cargo.toml -O Cargo.toml && \
-    cargo build --release && \
-    cd /
+RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
+ENV PATH="${PATH}:/root/.cargo/bin"
+
+RUN \
+    mkdir -p /judge \
+    && cd judge \
+    && cargo new --bin rust_workspace && cd rust_workspace \
+    && curl -OL https://raw.githubusercontent.com/cafecoder-dev/language-update/20.10/Rust/Cargo.toml \
+    && cargo build --release
 
 # Nim install
-RUN curl https://nim-lang.org/choosenim/init.sh -sSf | sh -s -- -y && \
-    echo 'export PATH=/root/.nimble/bin:$PATH' >> ~/.profile
+RUN curl https://nim-lang.org/choosenim/init.sh -sSf | sh -s -- -y \
+ENV PATH="/root/.nimble/bin:${PATH}"
     
-# Ruby install
-RUN apt install make libffi-dev openssl libssl-dev zlib1g-dev -y && \
-    git clone https://github.com/sstephenson/rbenv.git ~/.rbenv && \
-    echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.profile && \
-    echo 'eval "$(rbenv init -)"' >> ~/.profile && \
-    bash -c exec $SHELL -l && \
-    git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build && \
-    export PATH="$HOME/.rbenv/bin:$PATH" && rbenv install 2.7.2 && rbenv global 2.7.2
+RUN \
+    curl -OL https://cache.ruby-lang.org/pub/ruby/2.7/ruby-2.7.2.tar.gz \
+    && tar xvf ruby-2.7.2.tar.gz \
+    && cd ruby-2.7.2 \
+    && ./configure \
+    && make \
+    && make install \
+    && cd / \
+    && rm ruby-2.7.2.tar.gz && rm -rf ruby-2.7.2
 
 # Kotlin install
-RUN apt install zip unzip -y && \
-    curl -s https://get.sdkman.io | bash && \
-    bash && \
-    echo 'source "/root/.sdkman/bin/sdkman-init.sh"' >> ~/.profile && \
-    source ~/.profile && \
-    sdk install kotlin
+RUN \
+    curl -OL https://github.com/JetBrains/kotlin/releases/download/v1.4.10/kotlin-compiler-1.4.10.zip \
+    && unzip kotlin-compiler-1.4.10.zip -d /root \
+    && rm kotlin-compiler-1.4.10.zip
+ENV PATH="/root/kotlinc/bin:${PATH}"
 
 # Fortran install
-RUN apt install gfortran-10 -y
-    
+RUN \
+    apt-get update && apt-get install -y --no-install-recommends \
+        gfortran-10 \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
+
 # crystal
-RUN curl -sSL https://dist.crystal-lang.org/apt/setup.sh | bash && \
-    apt install crystal -y
+RUN \
+    curl -sSL https://dist.crystal-lang.org/apt/setup.sh | bash \
+    && apt-get update && apt-get install -y --no-install-recommends \
+        crystal \
+    && apt-get clean && rm -rf /var/lib/apt/lists/*
     
 # Perl install
-RUN wget https://www.cpan.org/src/5.0/perl-5.32.0.tar.gz && \
-    tar -xzf perl-5.32.0.tar.gz && \
-    cd perl-5.32.0 && \
-    ./Configure -Dprefix=$HOME/perl -Dscriptdir=$HOME/perl/bin -des -Dman1dir=none -Dman3dir=none -DDEBUGGING=-g && \
-    make --jobs=8 install
+RUN \
+    curl -OL https://www.cpan.org/src/5.0/perl-5.32.0.tar.gz \
+    && tar -xzf perl-5.32.0.tar.gz && cd perl-5.32.0 \
+    && ./Configure -Dprefix="/root/perl" -Dscriptdir="/root/perl/bin" -des -Dman1dir=none -Dman3dir=none -DDEBUGGING=-g \
+    && make --jobs=8 install \
+    && rm ../perl-5.32.0.tar.gz
 
 # install external libraries
 RUN \
-    wget https://raw.githubusercontent.com/MikeMirzayanov/testlib/master/testlib.h && \
-    wget https://github.com/atcoder/ac-library/releases/download/v1.0/ac-library.zip && unzip ac-library.zip
+    curl -OL https://raw.githubusercontent.com/MikeMirzayanov/testlib/master/testlib.h \
+    && curl -OL https://github.com/atcoder/ac-library/releases/download/v1.0/ac-library.zip \
+    && unzip ac-library.zip \
+    && rm ac-library.zip
 
 RUN \
-    apt install libcap-dev && \
-    git clone https://github.com/ioi/isolate.git /isolate
+    apt-get update && apt-get install -y --no-install-recommends \
+        libcap-dev \
+    && apt-get clean && rm -rf /var/lib/apt/lists/* \
+    && git clone https://github.com/ioi/isolate.git /isolate
 COPY ./default.cf /isolate/default.cf
 RUN cd /isolate && make install
 
-RUN apt-get clean && rm -rf /var/lib/apt/lists/*
-
 ENV DOWNLOAD_ROOT=/download
-ENV DOTNET_ROOT=$HOME/dotnet
-ENV PATH $PATH:$HOME/dotnet
-ENV PATH $PATH:/usr/local/go/bin
-ENV PATH $PATH:$HOME/.cargo/bin
-ENV PATH $PATH:/root/.nimble/bin
-ENV PATH $PATH:$HOME/.rbenv/bin
-ENV PATH $PATH:/root/.sdkman/candidates/kotlin/current/bin
-
-RUN mkdir /judge
-RUN mkdir /download
-RUN mkdir /box
-RUN mv /rust_workspace /judge
-RUN mkdir -p /judge/Main && chmod -R 777 /judge
-RUN chmod 777 /root
-RUN cp /testlib.h /judge/testlib.h
-
-#RUN mkdir -p /cafecoder-docker-rust/src
-#COPY dummy.rs /cafecoder-docker-rust/src/main.rs
-#COPY Cargo.toml /cafecoder-docker-rust
-#COPY Cargo.lock /cafecoder-docker-rust
-#COPY .env /cafecoder-docker-rust
-#COPY service-account-cafecoder.json /cafecoder-docker-rust
-#COPY default.cf /cafecoder-docker-rust
-#COPY service-account-cafecoder.json /cafecoder-docker-rust
-#RUN cd cafecoder-docker-rust && source $HOME/.cargo/env && cargo build --release
-
-#COPY src/ /cafecoder-docker-rust/src
-COPY . /cafecoder-docker-rust
-RUN cd cafecoder-docker-rust && \
-    source $HOME/.cargo/env && \
-    cargo build --release && \
-    cp target/release/cafecoder-docker-rs / && \
-    cp .env / && \
-    cp service-account-cafecoder.json / && \
-    cp default.cf / && \
-    mkdir /temp
-
-WORKDIR / 
-
-RUN source $HOME/.profile && dotnet -v ; exit 0
-
-ENTRYPOINT ["./cafecoder-docker-rs"]
+
+RUN \
+    mkdir /download \
+    && mkdir /box \
+    && mkdir -p /judge/Main && chmod -R 777 /judge \
+    && chmod 777 /root \
+    && cp /testlib.h /judge/testlib.h
+
+WORKDIR /
+COPY --from=build /work/target/release/cafecoder-docker-rs app
+COPY --from=build /work/.env .env
+COPY --from=build /work/default.cf default.cf
+COPY --from=build /work/service-account-cafecoder.json service-account-cafecoder.json
+
+RUN \
+    dotnet -v ; exit 0
+
+ENTRYPOINT ["./app"]
diff --git a/src/api.rs b/src/api.rs
index b17cb3e..ac08ae5 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -18,7 +18,7 @@ pub struct ApiResponse {
 
 impl<'r> Responder<'r, 'static> for ApiResponse {
     fn respond_to(self, req: &'r Request<'_>) -> response::Result<'static> {
-        Response::build_from(self.json.respond_to(&req).unwrap())
+        Response::build_from(self.json.respond_to(req).unwrap())
             .status(self.status)
             .header(ContentType::JSON)
             .ok()
diff --git a/src/api/judge.rs b/src/api/judge.rs
index 15bae00..960e965 100644
--- a/src/api/judge.rs
+++ b/src/api/judge.rs
@@ -156,7 +156,6 @@ fn update_result(submit_result: &mut JudgeResponse, testcase_result: &TestcaseRe
     updated
 }
 
-#[allow(clippy::clippy::unnecessary_wraps, unused_variables)]
 fn judging(
     cmd_result: &CmdResult,
     time_limit: i32,
diff --git a/src/models.rs b/src/models.rs
index 14f2a1f..6cb0f92 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -79,7 +79,7 @@ pub struct JudgeResponse {
     pub testcase_result_map: HashMap<i64, TestcaseResult>,
 }
 
-#[allow(clippy::unknown_clippy_lints)]
+#[allow(clippy::upper_case_acronyms)]
 #[derive(Debug, Deserialize, Serialize, Clone, Copy, PartialEq)]
 pub enum Status {
     AC,
@@ -110,9 +110,8 @@ impl fmt::Display for Status {
 }
 
 impl Status {
-    #[allow(dead_code)]
-    pub fn to_priority(&self) -> i32 {
-        match *self {
+    pub fn to_priority(self) -> i32 {
+        match self {
             Status::AC => 1,
             Status::TLE => 2,
             Status::MLE => 3,
diff --git a/compile_request.json b/tests/compile_request.json
similarity index 100%
rename from compile_request.json
rename to tests/compile_request.json
diff --git a/download_request.json b/tests/download_request.json
similarity index 100%
rename from download_request.json
rename to tests/download_request.json
diff --git a/judge_request.json b/tests/judge_request.json
similarity index 100%
rename from judge_request.json
rename to tests/judge_request.json
diff --git a/test.sh b/tests/test.sh
similarity index 100%
rename from test.sh
rename to tests/test.sh