Update Dockerfile to be less painful; Set JABY_ENGINE_PATH automatically

readme.md

@@ -23,6 +23,7 @@ JabyEngine is my personal attempt to eventually make my own PS1 game from "groun
 * `podman run -it <COMMIT ID> /bin/bash`: runs bash and interactive
 * `podman run --rm <-v <local_folder>:<absolute docker_folder> <-e ENV_VAR=VALUE>  jaby_engine`: clean up after run
 * `podman image tree <TAG/ID>`: lists usefull information
+* `podman run --rm -it -v ${JABY_ENGINE_PATH}:${JABY_ENGINE_PATH} jaby_engine /bin/bash` maybe a good idea...?
 
 ## How to build
 JabyEngine relies on linux to be build. For Windows users it uses `wsl` instead but support for it might get dropped during further development.