Moving container to its own directory; not just a nvim thing. Added a nightly workflow. Switched to tags trigger.

tools/Dockerfile

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+# Docker file for base Neovim image.
+# Debian image as base (unstable for newest software).
+FROM debian:unstable
+
+RUN apt-get update && apt-get install -y locales
+
+# Set image locale.
+ENV LANG=en_US.UTF-8
+ENV LANGUAGE=en_US:en
+ENV LC_ALL=en_US.UTF-8
+ENV TZ=America/New_York
+ENV TERM=xterm-256color
+
+# Create a non-root user with UID 1000
+RUN useradd -m -u 1000 -s /usr/bin/fish shaun
+
+# Install required software
+RUN apt-get update && apt-get -y install \
+  curl fzf ripgrep tree git xclip python3 python3-pip python3-venv nodejs npm \
+  tzdata ninja-build gettext libtool libtool-bin autoconf automake cmake g++ \
+  pkg-config zip unzip fish tmux
+
+# Cooperate Neovim with Python 3.
+RUN python3 -m pip install --break-system-packages --root-user-action ignore pynvim
+
+# Cooperate NodeJS with Neovim.
+RUN npm i -g neovim
+
+# Install Neovim from source.
+RUN mkdir -p /tmp/neovim-src && \
+  git clone --depth 1 --branch stable https://github.com/neovim/neovim /tmp/neovim-src && \
+  cd /tmp/neovim-src && make -j$(nproc) && make install && \
+  rm -rf /tmp/neovim-src
+
+# Clone configuration files.
+USER shaun
+WORKDIR /home/shaun
+
+RUN git clone https://gitea.setlock.net/shaun/dotfiles.git /home/shaun/dotfiles
+
+# Create directories.
+RUN mkdir -p /home/shaun/.config /home/shaun/.ssh
+
+# Softlink configuration files.
+RUN ln -s /home/shaun/dotfiles/nvim /home/shaun/.config
+RUN ln -s /home/shaun/dotfiles/fish /home/shaun/.config
+RUN ln -s /home/shaun/dotfiles/tmux /home/shaun/.config
+
+# Install tmux plugin manager.
+RUN git clone https://github.com/tmux-plugins/tpm /home/shaun/.config/tmux/plugins/tpm && \
+  /home/shaun/.config/tmux/plugins/tpm/scripts/install_plugins.sh
+
+# Get oh-my-fish and bob-the-fish installed.
+RUN curl https://raw.githubusercontent.com/oh-my-fish/oh-my-fish/master/bin/install > install
+RUN fish install --noninteractive
+RUN fish -c "omf install bobthefish"
+
+# Install Neovim plugins
+RUN nvim --headless "+Lazy! sync" +qa
+
+# Set default shell for shaun
+USER root
+RUN usermod --shell /usr/bin/fish shaun
+
+# Set workspace directory
+RUN mkdir -p /workspace
+RUN chown -R shaun:shaun /workspace
+
+# Switch to non-root user
+USER shaun
+WORKDIR /home/shaun
+
+# Avoid container exit.
+CMD ["tail", "-f", "/dev/null"]