🛠️ Refactor suggestion

[doridoridoriand]

          _:hammer_and_wrench: Refactor suggestion_

Consider using multi-stage builds to reduce image size.

The current build process includes development tools and temporary files in the final image, increasing its size unnecessarily.

Consider using a multi-stage build:

FROM ubuntu:focal AS builder

ENV TZ=Asia/Tokyo
RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get -y install \
    build-essential gcc g++ make libtool texinfo dpkg-dev pkg-config \
    libssl-dev zlib1g-dev libyaml-0-2 libyaml-dev wget

RUN cd /tmp && \
    wget "https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.4.tar.gz" && \
    tar -zxvf ruby-3.3.4.tar.gz && \
    cd ruby-3.3.4 && \
    ./configure --prefix=/usr/local && \
    make install

FROM ubuntu:focal
ENV TZ=Asia/Tokyo
COPY --from=builder /usr/local /usr/local

# Rest of your package installations...

---

⚠️ Potential issue

Add checksum verification for Ruby source.

While updating to Ruby 3.3.4 is good, it's recommended to verify the integrity of the downloaded tarball.

Apply this diff to add checksum verification:

-    cd /tmp && rm -rf ruby && wget "https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.4.tar.gz" && tar -zxvf ruby-3.3.4.tar.gz && \
-    cd ruby-3.3.4 && ./configure && make install
+    cd /tmp && rm -rf ruby && \
+    wget "https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.4.tar.gz" && \
+    wget "https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.4.tar.gz.sha256" && \
+    echo "$(cat ruby-3.3.4.tar.gz.sha256) ruby-3.3.4.tar.gz" | sha256sum --check && \
+    tar -zxvf ruby-3.3.4.tar.gz && \
+    cd ruby-3.3.4 && ./configure && make install && \
+    cd /tmp && rm -rf ruby-3.3.4* && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

    cd /tmp && rm -rf ruby && \
    wget "https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.4.tar.gz" && \
    wget "https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.4.tar.gz.sha256" && \
    echo "$(cat ruby-3.3.4.tar.gz.sha256) ruby-3.3.4.tar.gz" | sha256sum --check && \
    tar -zxvf ruby-3.3.4.tar.gz && \
    cd ruby-3.3.4 && ./configure && make install && \
    cd /tmp && rm -rf ruby-3.3.4* && \
    apt-get clean && rm -rf /var/lib/apt/lists/*

Originally posted by @coderabbitai[bot] in #101 (comment)