README.md: add portable info

README.md

@@ -31,7 +31,9 @@ Pwndbg exists not only to replace all of its predecessors, but also to have a cl
 
 ## How?
 
-Installation is straightforward:
+For a portable version with no external dependencies, scroll down for the [Portable Installation](#portable-installation) section.
+
+Installation from source is straightforward:
 
 ```shell
 git clone https://github.com/pwndbg/pwndbg
@@ -39,12 +41,6 @@ cd pwndbg
 ./setup.sh
 ```
 
-Or install via the Nix package manager (you can use Nix on any distribution):
-```shell
-nix shell github:pwndbg/pwndbg
-pwndbg ./your-binary
-```
-
 Pwndbg is supported on Ubuntu 20.04, and 22.04 with GDB 9.2 and later. We do not test on any older versions of Ubuntu, so `pwndbg` may not work on these versions (for Ubuntu 18.04 use the [2023.07.17: ubuntu18.04-final release](https://github.com/pwndbg/pwndbg/releases/tag/2023.07.17)). We may accept pull requests fixing issues in older versions on a case by case basis, please discuss this with us on [Discord](https://discord.gg/x47DssnGwm) first. You can also always checkout an older version of `pwndbg` from around the time the Ubuntu version you're interested in was still supported by Canonical, or you can attempt to build a newer version of GDB from source.
 
 Other Linux distributions are also supported via `setup.sh`, including:
@@ -66,6 +62,50 @@ cd build
 make -j7
 ```
 
+## Portable Installation:
+
+The portable version includes all necessary dependencies and should work without the need to install additional packages.
+
+### Download the Portable Version:
+
+Download the portable version from the [Pwndbg releases page](https://github.com/pwndbg/pwndbg/releases) by selecting the desired version. 
+Choose the appropriate version for your system architecture (x86_64 or aarch64).
+
+### Installation on RPM-based Systems (CentOS/Alma/Rocky/RHEL):
+
+```shell
+dnf install ./pwndbg-2023.07.17.x86_64.rpm
+# pwndbg
+```
+
+### Installation on DEB-based Systems (Debian/Ubuntu/Kali):
+
+```shell
+apt install ./pwndbg_2023.07.17_amd64.deb
+# pwndbg
+```
+
+### Installation on Alpine:
+
+```shell
+apk add --allow-untrusted ./pwndbg_2023.07.17_x86_64.apk
+# pwndbg
+```
+
+### Installation on Arch Linux:
+
+```shell
+pacman -U ./pwndbg-2023.07.17-1-x86_64.pkg.tar.zst
+# pwndbg
+```
+
+### Generic Linux Installation:
+
+```shell
+tar -v -xf ./pwndbg_2023.07.17_amd64.tar.gz
+# ./pwndbg/bin/pwndbg
+```
+
 ## What can I do with that?
 
 For further info about features/functionalities, see [FEATURES](FEATURES.md).
@@ -88,3 +128,4 @@ Disclaimer - this won't work on apple silicon macs.
 ## Contact
 If you have any questions not worthy of a [bug report](https://github.com/pwndbg/pwndbg/issues), feel free to ping
 anybody on [Discord](https://discord.gg/x47DssnGwm) and ask away.
+