feat(devcontainer): upgrade dev environment with better prompts, extensions, and configs (#95)

* chore(devcontainer): optimize Dockerfile for Ruby dev environment

* chore(devcontainer): update container name and improve VSCode settings

- Rename devcontainer from 'Maybe' to 'Sure'
- Add GIT_EDITOR env var for VSCode integration
- Add Shopify Ruby extensions pack

* feat(devcontainer): add custom Bash prompt with Git info

- Implement Git branch, status markers in prompt
- Show username, current dir, and Git info with colors
- Mount custom .bashrc into container for prompt enhancements

* fix(devcontainer): improve branch detection & status markers in prompt

- Support detached HEAD by showing short SHA
- Show detailed git states: rebase, merge, bisect, am
- Fix prompt formatting and trailing colors

* Better solution to GitHub Codespaces CSRF issue

* feat(devcontainer): add Git autocompletion support in bashrc

* refactor(devcontainer): reorder volumes and service settings

- Added volume mounts for workspace & bundle cache to worker service.

---------

Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

.devcontainer/Dockerfile

@@ -1,26 +1,29 @@
 ARG RUBY_VERSION=3.4.4
 FROM ruby:${RUBY_VERSION}-slim-bullseye
 
-RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-  && apt-get -y install --no-install-recommends \
-  apt-utils \
-  build-essential \
-  curl \
-  git \
-  imagemagick \
-  iproute2 \
-  libpq-dev \
-  libyaml-dev \
-  libyaml-0-2 \
-  openssh-client \
-  postgresql-client \
-  vim
+ENV DEBIAN_FRONTEND=noninteractive
 
-RUN gem install bundler
-RUN gem install foreman
+RUN apt-get update -qq \
+  && apt-get -y install --no-install-recommends \
+    apt-utils \
+    build-essential \
+    curl \
+    git \
+    imagemagick \
+    iproute2 \
+    libpq-dev \
+    libyaml-dev \
+    libyaml-0-2 \
+    openssh-client \
+    postgresql-client \
+    vim \
+  && rm -rf /var/lib/apt/lists /var/cache/apt/archives
+
+RUN gem install bundler foreman
 
 # Install Node.js 20
 RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
-&& apt-get install -y nodejs
+  && apt-get install -y nodejs \
+  && rm -rf /var/lib/apt/lists /var/cache/apt/archives
 
 WORKDIR /workspace