updated README

README.md

@@ -4,12 +4,12 @@ Template for a yocto workspace to use with docker.
 
 ## Requirements
 
-### docker
+### Docker
 
 This template requires docker to work.
 See the [official manual](https://docs.docker.com/engine/install/) to set it up.
 
-### custom yocto docker image
+### Yocto docker image
 
 The custom image is available on hub.anxietyprime.de/yocto:latest, but requires login.
 It can be build locally following the instructions in https://git.anxietyprime.de/timoschneider/docker-yocto.
@@ -37,3 +37,22 @@ yocto (origin)
     └── start-docker.sh
 ```
 The cache and download folders are auto generated.
+
+## Usage
+
+### First use
+To setup everything, the first time the container has to be started via the start-docker.sh script.
+It will generate all folders and assert they are not owned by root.
+
+### Manage container
+After the first start, the container can be managed by the default docker compose commands.
+
+### Enter container
+The container can be entered by executing
+```bash
+docker attach yocto
+```
+or
+```bash
+docker exec -it yocto zsh
+```