update alpine linux installation instructions

README.md

@@ -510,8 +510,9 @@ Historically, [it has been breaking often and for extended periods of time](
 ### Alpine Linux
 
 ```zsh
-apk add zsh-theme-powerlevel10k
+apk add zsh zsh-theme-powerlevel10k
-echo 'source /usr/share/zsh/plugins/powerlevel10k/powerlevel10k.zsh-theme' >>~/.zshrc
+mkdir -p ~/.local/share/zsh/plugins
+ln -s /usr/share/zsh/plugins/powerlevel10k ~/.local/share/zsh/plugins/
 ```
 
 ## Configuration