docs: add build instructions for arm64 arch

Readme.md

@@ -29,19 +29,39 @@ You can download the pre-built binaries from the release page [release page](htt
 
 To build `oryx`:
 
-1. Install Rust nightly toolchain
+#### 1. Install Rust nightly toolchain
 
 ```
 rustup toolchain install nightly --component rust-src
 ```
 
-2. Install [bpf-linker](https://github.com/aya-rs/bpf-linker)
+#### 2. Install [bpf-linker](https://github.com/aya-rs/bpf-linker)
+
+##### For `x86_64`
+
+Simply run the following command:
 
 ```
 cargo install bpf-linker
 ```
 
-3. Build
+##### For `arm64`
+
+For Debian based distributions, make sure you have the following dependencies installed:
+
+- `llvm-19`
+- `llvm-19-dev`
+- `libpolly-19-dev`
+
+then run the following command:
+
+```
+cargo install bpf-linker --no-default-features
+```
+
+> Check [bpf-linker Installation section](https://github.com/aya-rs/bpf-linker?tab=readme-ov-file#installation) for more infos.
+
+#### 3. Build
 
 ```
 cargo xtask build --release