docs(book): update build instructions for Linux with just

Signed-off-by: k4yt3x <i@k4yt3x.com>

docs/book/src/building/linux.md

@@ -4,47 +4,51 @@ Instructions for building this project on Linux.
 
 ## Arch Linux
 
-Arch users can build the latest version of the project from the AUR package `video2x-git`. The project's repository also contains another PKGBUILD example at `packaging/arch/PKGBUILD`.
+Arch users can build the latest version of the project from the AUR packages [`video2x`](https://aur.archlinux.org/packages/video2x) and [`video2x-git`](https://aur.archlinux.org/packages/video2x-git). The project's repository also contains another PKGBUILD example at `packaging/arch/PKGBUILD`.
 
 ```bash
-# Build only
-git clone https://aur.archlinux.org/video2x-git.git
+git clone https://aur.archlinux.org/video2x.git
 cd video2x-git
+
+# Build the package without installing it
 makepkg -s
+
+# Build and install the package
+makepkg -si
 ```
 
 To build manually from the source, follow the instructions below.
 
 ```bash
 # Install build and runtime dependencies
 # See the PKGBUILD file for the list of up-to-date dependencies
-pacman -Sy ffmpeg ncnn vulkan-driver opencv spdlog boost-libs
-pacman -Sy git cmake make clang pkgconf vulkan-headers openmp boost
+pacman -Sy ffmpeg ncnn vulkan-driver spdlog boost-libs
+pacman -Sy git cmake clang pkgconf just vulkan-headers openmp boost
 
 # Clone the repository
 git clone --recurse-submodules https://github.com/k4yt3x/video2x.git
 cd video2x
 
 # Build the project
-make build
+just build
 ```
 
 The built binaries will be located in the `build` directory.
 
 ## Ubuntu
 
-Ubuntu users can use the `Makefile` to build the project automatically. The `ubuntu2404` and `ubuntu2204` targets are available for Ubuntu 24.04 and 22.04, respectively. `make` will automatically install the required dependencies, build the project, and package it into a `.deb` package file. It is recommended to perform the build in a container to ensure the environment's consistency and to avoid leaving extra build packages on your system.
+Ubuntu users can use the `.justfile` to build the project automatically. The `ubuntu2404` and `ubuntu2204` targets are available for Ubuntu 24.04 and 22.04, respectively. `just` will automatically install the required dependencies, build the project, and package it into a `.deb` package file. It is recommended to perform the build in a container to ensure the environment's consistency and to avoid leaving extra build packages on your system.
 
 ```bash
-# make needs to be installed manually
-sudo apt-get update && sudo apt-get install make
+# just needs to be installed manually
+sudo apt-get update && sudo apt-get install just
 
 # Clone the repository
 git clone --recurse-submodules https://github.com/k4yt3x/video2x.git
 cd video2x
 
 # Build the project
-make ubuntu2404
+just ubuntu2404
 ```
 
 The built `.deb` package will be located under the current directory.