info_tfgrid/docs/hero_mdbook_docker.md

<h1>Deploy mdBook with Hero on Docker</h1>

<h2>Table of Contents</h2>

- [Introduction](#introduction)
- [Prerequisites](#prerequisites)
- [Steps](#steps)
- [Questions and Feedback](#questions-and-feedback)

---

## Introduction

We give the basic steps to use Hero on Docker to run and create mdBooks.

You can then use a code editor, e.g. VSCodium, to change the files locally and use Hero docker to build and serve the book.

## Prerequisites

- Docker engine should be installed and running
- You need a git repository to work with (here we use **info_tfgrid**)
  - Clone the hero mdbook repo on your local machine (i.e. the host) and note the path

## Steps

We show the steps to use Hero with Docker.

Once you've set Hero Docker, you can adjust the files at the host path in a code editor and use the docker container to build and serve the book with Hero.

Note that you will need to adjust the local path of the git repo and the docker path of the git repo.

- On a terminal window, start Hero docker
  ```
  sudo docker run --name herodocker -d -v /local/machine/path/to/git/repo:/docker/path/to/git/repo/ ghcr.io/scottyeager/hero:latest
  ```
  - In our case, the docker path to the repo is the following
    ```
    /root/code/git.ourworld.tf/tfgrid/info_tfgrid/
    ```
- Execute the Hero docker container
  ```
  sudo docker exec -it herodocker bash
  ```
- Git configuration
  - Set git lobally with a safe directory
    ```
    git config --global --add safe.directory /root/code/git.ourworld.tf/tfgrid/info_tfgrid
    ```
- You can now use Hero normally, e.g. with **projectinca**
  - With a URL:
    ```
    hero mdbook -u https://git.ourworld.tf/tfgrid/info_tfgrid/src/branch/main/heroscript/projectinca
    ```
  - With a path:
    ```
    hero mdbook -p /root/code/git.ourworld.tf/tfgrid/info_tfgrid/heroscript/projectinca
    ```
    - In this case, you can modify the mdbook on the local machine's git repo that you set in the prerequisites section and the changes will be shown on the docker path
- To view the mdbook on your local browser, run the lines:
  ```
  cd ~/hero/var/mdbuild/projectinca/
  mdbook serve -n 0.0.0.0
  ```
- You should be able to view the rendered book at
  ```
  http://172.17.0.2:3000/
  ```
- To stop the container, exit the Docker container with `exit` and run the following:
    ```
    sudo docker stop herodocker
    ```
- To start Hero after having stopped the container, run the following:
  ```
  sudo docker start herodocker
  ```
  - You can now run the previous line **docker exec** and continue your work.
- If you need to update the docker Hero image, run the following line:
    ```
    docker pull ghcr.io/scottyeager/hero:latest
    ```

## Questions and Feedback

If you have any questions or feedback, please let us know by either writing a post on the [ThreeFold Forum](https://forum.threefold.io/), or by chatting with us on the [TF Grid Tester Community](https://t.me/threefoldtesting) Telegram channel.