docs: installation page

docs/docs/2-getting-started/1-installation.md

@@ -1,23 +1,78 @@
 # Installation
 
-Install Uncloud CLI:
+Install the Uncloud command-line utility to manage your machines and deploy apps using `uc` commands. You will run `uc`
+locally so choose the appropriate installation method for your operating system.
+
+## Homebrew (macOS, Linux)
+
+If you have [Homebrew](https://brew.sh/) package manager installed, this is the recommended installation method on macOS
+and Linux:
 
 ```bash
 brew install psviderski/tap/uncloud
+```
 
-# or using curl (macOS/Linux)
+To upgrade to the latest version:
+
+```bash
+brew upgrade uncloud
+```
+
+## Install script (macOS, Linux)
+
+For a quick automated installation, use the install script:
+
+```bash
 curl -fsS https://get.uncloud.run/install.sh | sh
 ```
 
----
+The script will:
 
-👋 Hey there! This page is still being written. I'm working hard to get all the documentation ready, but there's a lot to
-cover and I want to make sure it's actually helpful rather than rushing it out with LLM slop.
+- Detect your operating system and architecture
+- Download the appropriate latest binary from [GitHub releases](https://github.com/psviderski/uncloud/releases)
+- Install it to `/usr/local/bin/uncloud` using `sudo` (you may need to enter your user password)
+- Create a shortcut `uc` in `/usr/local/bin` for convenience
 
-In the meantime, if you need help or have any questions, please jump into our
-[Discord server](https://discord.gg/eR35KQJhPu). We're a friendly bunch and always happy to help troubleshoot issues or
-answer questions!
+Don't like `curl | sh`? You can download and review the [install script](https://get.uncloud.run/install.sh) first and
+then run it:
 
-Thanks for your patience as I get the docs into shape.
+```bash
+curl -fsSO https://get.uncloud.run/install.sh
+cat install.sh
+sh install.sh
+```
 
-– Pasha
+## GitHub download (macOS, Linux)
+
+You can manually download and use a pre-built binary from the
+[latest release](https://github.com/psviderski/uncloud/releases/latest) on GitHub.
+
+Make sure to replace `(macos|linux)` and `(amd64|arm64)` with your OS and architecture.
+
+```bash
+curl -L https://github.com/psviderski/uncloud/releases/latest/download/uncloud_(macos|linux)_(amd64|arm64).tar.gz | tar xz
+mv uncloud uc
+```
+
+You can use the `./uc` binary directly from the current directory, or move it to a directory in your system's `PATH`
+to run it as `uc` from any location.
+
+For example, move it to `/usr/local/bin` which is a common location for user-installed binaries:
+
+```bash
+sudo mv ./uc /usr/local/bin
+```
+
+## Verify installation
+
+After installation, verify that `uc` command is working:
+
+```bash
+uc --version
+```
+
+## Next steps
+
+Now that you have `uc` installed, you're ready to:
+
+- [Quick start](./quick-start) — Deploy your first application