Add Pi-hole with AdGuard DOH/DOT integration, reorganize swarm stacks, add DNS/n8n docs

builds/ubuntu-unbound/Dockerfile

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+FROM ubuntu:22.04
+
+# Avoid prompts during package installation
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=UTC
+
+# Set ZSH as default shell
+ENV SHELL=/usr/bin/zsh
+
+# Install essential packages
+RUN apt update && apt install -y \
+    # DNS and networking
+    unbound \
+    dnsutils \
+    bind9-utils \
+    net-tools \
+    iputils-ping \
+    traceroute \
+    curl \
+    wget \
+    # SSH server
+    openssh-server \
+    # Shell and utilities
+    zsh \
+    git \
+    vim \
+    nano \
+    htop \
+    tmux \
+    tree \
+    ncdu \
+    # System tools
+    sudo \
+    ca-certificates \
+    gnupg \
+    lsb-release \
+    software-properties-common \
+    # Build tools (useful for compiling)
+    build-essential \
+    # Process management
+    supervisor \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Oh My Zsh (for root)
+RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" "" --unattended
+
+# Set ZSH as default shell for root
+RUN chsh -s /usr/bin/zsh root
+
+# Configure SSH
+RUN mkdir /var/run/sshd && \
+    # Change SSH port to 2222
+    sed -i 's/#Port 22/Port 2222/' /etc/ssh/sshd_config && \
+    # Enable root login (change to 'no' if you want to create a separate user)
+    sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/' /etc/ssh/sshd_config && \
+    # SSH login fix for container
+    sed 's@session\s*required\s*pam_loginuid.so@session optional pam_loginuid.so@g' -i /etc/pam.d/sshd
+
+# Set a default root password (CHANGE THIS!)
+RUN echo 'root:changeme123' | chpasswd
+
+# Create necessary directories
+RUN mkdir -p /var/log/supervisor /config/unbound /config/supervisor
+
+# Copy supervisor configuration
+COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+
+# Expose ports
+EXPOSE 2222 5335
+
+# Working directory
+WORKDIR /config
+
+# Start supervisor
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]