add installation instructions for alpine; related: #1828

README.md

@@ -411,6 +411,7 @@ Powerlevel10k.
 - [Zinit](#zinit)
 - [Homebrew](#homebrew)
 - [Arch Linux](#arch-linux)
+- [Alpine Linux](#arch-linux)
 
 ### Manual
 
@@ -506,6 +507,13 @@ There is also [zsh-theme-powerlevel10k](
 Historically, [it has been breaking often and for extended periods of time](
   https://github.com/romkatv/powerlevel10k/pull/786). **Do not use it.**
 
+### Alpine Linux
+
+```zsh
+apk add zsh-theme-powerlevel10k
+echo 'source /usr/share/zsh/plugins/powerlevel10k/powerlevel10k.zsh-theme' >>~/.zshrc
+```
+
 ## Configuration
 
 - [For new users](#for-new-users)
@@ -756,7 +764,7 @@ Powerlevel10k is released under the
 The command to update Powerlevel10k depends on how it was installed.
 
 | Installation                  | Update command                                              |
-|---------------------------|-------------------------------------------------------------|
+|-------------------------------|-------------------------------------------------------------|
 | [Manual](#manual)             | `git -C ~/powerlevel10k pull`                               |
 | [Oh My Zsh](#oh-my-zsh)       | `git -C ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k pull` |
 | [Prezto](#prezto)             | `zprezto-update`                                            |
@@ -768,6 +776,7 @@ The command to update Powerlevel10k depends on how it was installed.
 | [Zinit](#zinit)               | `zinit update`                                              |
 | [Homebrew](#homebrew)         | `brew update && brew upgrade`                               |
 | [Arch Linux](#arch-linux)     | `yay -S --noconfirm zsh-theme-powerlevel10k-git`            |
+| [Alpine Linux](#alpine-linux) | `apk update && apk upgrade`                                 |
 
 **IMPORTANT**: Restart Zsh after updating Powerlevel10k. [Do not use `source ~/.zshrc`](
   #weird-things-happen-after-typing-source-zshrc).
@@ -806,7 +815,7 @@ The command to update Powerlevel10k depends on how it was installed.
    Refer to the [installation instructions](#installation) if you need a reminder.
 
    | Installation                  | Uninstall command                                                |
-   |---------------------------|------------------------------------------------------------------|
+   |-------------------------------|------------------------------------------------------------------|
    | [Manual](#manual)             | `rm -rf ~/powerlevel10k`                                         |
    | [Oh My Zsh](#oh-my-zsh)       | `rm -rf -- ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/themes/powerlevel10k` |
    | [Prezto](#prezto)             | n/a                                                              |
@@ -818,6 +827,7 @@ The command to update Powerlevel10k depends on how it was installed.
    | [Zinit](#zinit)               | `zinit delete romkatv/powerlevel10k`                             |
    | [Homebrew](#homebrew)         | `brew uninstall powerlevel10k; brew untap romkatv/powerlevel10k` |
    | [Arch Linux](#arch-linux)     | `yay -R --noconfirm zsh-theme-powerlevel10k-git`                 |
+   | [Alpine Linux](#alpine-linux) | `apk del zsh-theme-powerlevel10k`                            |
 6. Restart Zsh. [Do not use `source ~/.zshrc`](#weird-things-happen-after-typing-source-zshrc).
 7. Delete Powerlevel10k cache files.
    ```zsh