Improve base alpine install

configure-alpine.sh

#!/bin/sh
# Alpine Linux Server Enhancement Script
# Structured with functions
# Run as root

set -e

# -------------------------------
# Update & upgrade system
# -------------------------------
update_system() {
    echo ">>> Updating system..."
    apk update && apk upgrade
}

# -------------------------------
# Install base utilities
# -------------------------------
install_utilities() {
    echo ">>> Installing useful base utilities..."
    apk add --no-cache \
        bash bash-completion \
        curl wget rsync \
        nano nano-syntax vim \
        htop iotop ncdu \
        lsof net-tools iproute2 \
        tmux \
        logrotate \
        openssh openssl \
        sudo tzdata
}

# -------------------------------
# Configure nano
# -------------------------------
configure_nano() {
    echo ">>> Configuring nano..."
    NANO_RC="/etc/nanorc"

    # Backup existing nanorc if not already done
    [ -f "$NANO_RC" ] && cp "$NANO_RC" "${NANO_RC}.bak"

    cat << 'EOF' > "$NANO_RC"
# System-wide nano configuration

## Enable syntax highlighting
include /usr/share/nano/*.nanorc

## Show line numbers
set linenumbers

## Enable auto indent
set autoindent

## Enable mouse support
set mouse

## Enable soft line wrapping
set softwrap

## Highlight search matches
set highlight
EOF
}

# -------------------------------
# Configure timezone
# -------------------------------
configure_timezone() {
    echo ">>> Setting timezone to UTC..."
    setup-timezone -z UTC
}

# -------------------------------
# Enable system logging
# -------------------------------
enable_logging() {
    echo ">>> Enabling system logging..."
    apk add --no-cache rsyslog
    rc-update add rsyslog
    rc-service rsyslog start
}

# -------------------------------
# Enable automatic updates
# -------------------------------
enable_auto_updates() {
    echo ">>> Setting up automatic updates..."
    apk add --no-cache unattended-upgrades
    rc-update add unattended-upgrades
    rc-service unattended-upgrades start
}

# -------------------------------
# Cleanup
# -------------------------------
cleanup() {
    echo ">>> Cleaning up package cache..."
    apk cache clean
}

# -------------------------------
# Main function
# -------------------------------
main() {
    update_system
    install_utilities
    configure_nano
    configure_timezone
    enable_logging
    enable_auto_updates
    cleanup

    echo ">>> Enhancement complete! Reboot recommended."
}

main "$@"