Update README.md

README.md

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 # stack
 
-simple bash script for container management (updating, starting, adding containers to control)
+simple bash script for compose file container management (updating, starting, adding containers to control)
+
+this is meant to be used on servers, not home container workflows.
+
+## usage:
+
+make a stack.conf in your home folder that contains just this.
+
+**replace nune with your user's name.**
+
+``STACK_HOME=/home/user``
+
+then, copy ``stack`` to somewhere in your user's path. ``chmod +x`` it.
+
+after, containers with compose file can be added for mass control with your shell.
+
+``stack add FOLDERNAME`` will add ``/home/user/FOLDERNAME`` to your stack.conf. this also applies for folders in nested paths.
+you can also add your current folder. let's say you're in /home/user/pizza. you got a compose.yml there. you add it to stack with ``stack add .``.
+depending on shell, you can add folders to stack.conf in bulk.
+for zsh: ``stack add {beep,boop}``.
+
+after, your stack.conf will look like:
+``STACK_HOME=/home/user
+/home/user/FOLDERNAME
+/home/user/pizza
+/home/user/beep
+/home/user/boop
+``
+
+now that you got a stack, you can easily start your stack.
+
+``stack start`` will bring those four containers up.
+
+let's say you wanna keep them updated.
+
+``stack update`` will pull their latest images and restart them.