Added README.

README.md

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+# LogalDeveloper's Arch Linux Installer
+
+An automated Arch Linux installer which reflects my personal preferences.
+
+## Features
+
+### Options
+
+- **Storage**: BTRFS, BTRFS with data duplication, BTRFS RAID1 (two disks), or ext4
+- **Networking**: Optional iwd for Wi-Fi
+- **Profiles**:
+  - Minimal: Base system only
+  - Basic Desktop: KDE Plasma with Chromium and multimedia
+  - Office Workstation: KDE Plasma with full productivity suite
+
+### Defaults
+
+- **Full-disk encryption**: LUKS2 with modern key derivation
+- **Bootloader**: systemd-boot
+- **Networking**: systemd-networkd and systemd-resolved
+- **Firewall**: nftables with default inbound deny (except SSH) and default outbound allow
+- **SSH**: OpenSSH configured with modern algorithms only
+- **USB**: USBGuard for device whitelisting
+- **Users**: Root account disabled; sudo via wheel group
+- **Hardware**: Automatic CPU microcode installation (Intel/AMD), SSD TRIM, fwupd for firmware updates
+- **Performance**: TCP BBR congestion control
+- **Maintenance**: SMART monitoring, BTRFS scrub timer (when applicable)
+- **Mirror**: [My personal Arch Linux mirror](https://logal.dev/projects/arch-linux-mirror/)
+- **DNS**: No fallback DNS (must be provided via DHCP or static config), LLMNR and mDNS disabled
+- **CA**: LogalNet internal CA pre-installed
+- **Logging**: Installation log saved to `/var/log/arch-install.log`
+
+### KDE Defaults
+
+- **Audio**: PipeWire audio stack
+- **Browser**: Chromium with Vulkan and hardware video acceleration
+- **Wallet**: KWallet with PAM integration for auto-unlock on login
+
+## Requirements
+
+- Arch Linux live ISO
+- EFI-capable system
+- Internet connectivity
+- One disk for standard installation, two disks for RAID1
+
+## Usage
+
+Boot into the Arch Linux live ISO, then run:
+
+```bash
+pacman -Sy git
+git clone https://github.com/LogalDeveloper/Arch-Linux-Installer.git
+cd Arch-Linux-Installer
+./install-arch-linux.sh
+```
+
+## Customization
+
+Profiles and package lists are defined in `config/profiles.conf`. Custom CA certificates can be added to `files/certs/`.
+
+## Disclaimer
+
+This installer is provided as-is. It is designed around my specific use case and probably makes assumptions that don't fit all hardware or configurations.
+
+**Use at your own risk.** Always have backups before installing any operating system.