docs: add all info

README.md

@@ -1,11 +1,49 @@
 ![build](https://github.com/AngryMaciek/angry-runner/actions/workflows/build.yaml/badge.svg)
 [![Docker](https://badgen.net/badge/icon/docker?icon=docker&label)](https://hub.docker.com/r/angrymaciek/angry-runner)
 [![CodeFactor](https://www.codefactor.io/repository/github/angrymaciek/angry-runner/badge)](https://www.codefactor.io/repository/github/angrymaciek/angry-runner)
+[![GitHub license](https://img.shields.io/github/license/AngryMaciek/angry-runner)](https://github.com/AngryMaciek/angry-runner/blob/master/LICENSE)
 
 # Angry Runner (😠🏃‍♂️)
 
-Delicious recipe for a Docker image suitable for self-hosted GitHub Actions runners.
+Delicious recipe for a Docker image suitable for self-hosted GitHub Actions runners as well as local dev.
 
 Enjoy!
 
 _~AngryMaciek_
+
+
+### Brief description
+
+The base image here is the popular `ubuntu:22:04` - that is to increase the similarity of the container system to users OSs; A few system tools come pre-installed: [GNU Bash](https://www.gnu.org/software/bash/), [gcc & g++](https://gcc.gnu.org/), [Git](https://git-scm.com/), [GNU Make](https://www.gnu.org/software/make/), [CMake](https://cmake.org/), [Vim](https://www.vim.org/) and most importantly - [mambaforge](https://github.com/conda-forge/miniforge), which has been set up for the (default) root user; port `8888` is exposed to the host machine; dir `/workdir` is available to mount a volume; an entrypoint script has been designed to add a new non-root linux user which can access conda via a system's group; executing commands as `angryuser` is available through [gosu](https://github.com/tianon/gosu).
+
+Useful references:
+* https://denibertovic.com/posts/handling-permissions-with-docker-volumes/
+* https://askubuntu.com/questions/1457726/how-and-where-to-install-conda-to-be-accessible-to-all-users
+* https://www.fromlatest.io
+
+### Local development
+
+(Provided you have a Docker engine installed and set up)
+
+In order to build a container please clone this repository and execute `docker build`:
+
+```bash
+cd $HOME
+git clone https://github.com/AngryMaciek/angry-runner.git
+docker build -f angry-runner/Dockerfile -t angrymaciek/angry-runner:latest angry-runner
+```
+
+Alternatively to building yourself you can pull the container from the DockerHub:
+
+```bash
+docker pull angrymaciek/angry-runner:latest
+```
+
+Run the container with:
+
+```bash
+docker run --name angry-runner -e HOSTUID=`id -u $USER` -p 8888:8888 -it -v $HOME:/workdir angry-runner:latest
+```
+
+In the example above my whole home directory is mounted as the volume.  
+This may, of course, be adjusted.