Add ruby, docker, and custom zsh theme

Dockerfile

@@ -33,7 +33,9 @@ RUN apt update \
 	# JAVA LATEST
 	openjdk-20-jdk-headless \
 	# .NET-CORE LATEST
-	dotnet6 \	
+	dotnet6 \
+	# Ruby LATEST
+	ruby-full rbenv \
 	# CLEAN UP
 	&& apt-get purge --auto-remove -y \
 	&& apt-get clean \
@@ -44,6 +46,9 @@ RUN apt update \
 
 # Zshell Configuration
 RUN chsh -s $(which zsh)
+RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" "" --unattended
+COPY polyglot.zsh-theme /root/.oh-my-zsh/themes/polyglot.zsh-theme
+RUN sed -i 's/ZSH_THEME="robbyrussell"/ZSH_THEME="polyglot"/' /root/.zshrc
 
 # Git Configuration
 RUN \
@@ -59,8 +64,8 @@ RUN \
 
 # GO installation
 RUN \
-	curl -OL https://go.dev/dl/go1.21.3.linux-amd64.tar.gz \
-	&& tar -C /usr/local -xvf go1.21.3.linux-amd64.tar.gz \
+	curl -OL https://go.dev/dl/go1.21.5.linux-amd64.tar.gz \
+	&& tar -C /usr/local -xvf go1.21.5.linux-amd64.tar.gz \
 	&& ln -s /usr/local/go/bin/go /usr/bin/go
 
 # Node installation with nvm 
@@ -77,17 +82,25 @@ RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.5/install.sh | b
 RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | bash -s -- -y
 ENV PATH="/root/.cargo/bin:${PATH}"
 
+# Docker installation
+RUN curl -fsSL https://get.docker.com | sh
+
 # Print versions
 RUN \
 	echo "Tool versions:" \
 	&& python --version \
 	&& pip --version \
 	&& poetry --version \
+	&& pipenv --version \
 	&& java -version \
 	&& go version \
 	&& dotnet --version \
 	&& node --version \
 	&& npm --version \
 	&& rustup --version \
-	&& rustc --version
+	&& rustc --version \
+	&& ruby --version \
+	&& gem --version \
+	&& rbenv --version \
+	&& docker --version
 

README.md

@@ -7,7 +7,7 @@ Multi programming language container image built for interactive development env
 - [Coder](https://coder.com)
 - [GitHub Codespaces](https://github.com/features/codespaces)
 - [JupyterLab](https://jupyter.org)
-- CICD Systems
+- [GitLab](https://about.gitlab.com)
 - etc.
 
 _NOTE:_ This image is on the large side, around 2.5GB in total. This makes it too big for most large scale uses. But in small scale it seems to work quite well despite its size.
@@ -18,14 +18,16 @@ This image is based on Ubuntu 23.10 (mantic)
 
 ## Included Languages & Tools
 
-- Node == 18.18.0
-- nvm == 0.39.5
-- npm == 9.8.1
-- Java == 20.0.2
-- Dotnet == 6.0.122
-- Python == 3.11.5
-- Poetry == 1.1.13
-- GO == 1.21.1
+| Language Ecosystem | Version  | Included Tools |
+| ------------------ | -------- | -------------- |
+| Node               | 20.10.0  | nvm, npm       |
+| Python             | 3.11.5   | Poetry, pipenv |
+| Ruby               | 3.1.2p20 | gem, rbenv     |
+| Java               | 20.0.2   |                |
+| Dotnet             | 6.0.122  |                |
+| GO                 | 1.21.5   |                |
+| Rust               | 1.74.1   |                |
+| Docker             | 24.0.7   |                |
 
 # Build Instructions