[DOCS] Make linux installation instructions more clear (#1927)

* Make linux installation instructions more clear

* Update running-headscale-linux.md

docs/running-headscale-linux.md

@@ -20,17 +20,19 @@ configuration (`/etc/headscale/config.yaml`).
 
 ## Installation
 
-1. Download the latest Headscale package for your platform (`.deb` for Ubuntu and Debian) from [Headscale's releases page](https://github.com/juanfont/headscale/releases):
+1. Download the [latest Headscale package](https://github.com/juanfont/headscale/releases/latest) for your platform (`.deb` for Ubuntu and Debian).
 
     ```shell
+    HEADSCALE_VERSION="" # See above URL for latest version, e.g. "X.Y.Z" (NOTE: do not add the "v" prefix!)
+    HEADSCALE_ARCH="" # Your system architecture, e.g. "amd64"
     wget --output-document=headscale.deb \
-      https://github.com/juanfont/headscale/releases/download/v<HEADSCALE VERSION>/headscale_<HEADSCALE VERSION>_linux_<ARCH>.deb
+      "https://github.com/juanfont/headscale/releases/download/v${HEADSCALE_VERSION}/headscale_${HEADSCALE_VERSION}_linux_${HEADSCALE_ARCH}.deb"
     ```
 
 1. Install Headscale:
 
     ```shell
-    sudo apt install headscale.deb
+    sudo apt install ./headscale.deb
     ```
 
 1. Enable Headscale service, this will start Headscale at boot:

docs/running-headscale-openbsd.md

@@ -9,19 +9,17 @@
 
 ## Goal
 
-This documentation has the goal of showing a user how-to install and run `headscale` on OpenBSD 7.1.
+This documentation has the goal of showing a user how-to install and run `headscale` on OpenBSD.
 In additional to the "get up and running section", there is an optional [rc.d section](#running-headscale-in-the-background-with-rcd)
 describing how to make `headscale` run properly in a server environment.
 
 ## Install `headscale`
 
-1. Install from ports (not recommended)
+1. Install from ports
 
-    !!! info
+    You can install headscale from ports by running `pkg_add headscale`.
 
-        As of OpenBSD 7.2, there's a headscale in ports collection, however, it's severely outdated(v0.12.4). You can install it via `pkg_add headscale`.
-
-1. Install from source on OpenBSD 7.2
+1. Install from source
 
     ```shell
     # Install prerequistes