updated docker docs hero

docs/hero_mdbook_docker.md

@@ -13,15 +13,19 @@
 
 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 and note the path
+  - Clone the hero mdbook repo on your local machine (i.e. the host) and note the path
 
 ## Steps
 
-In this setup, we will have two temrinal windows running. One window running the **docker run** command and the other running the **docker exec** command. Steps are shown in details.
+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.
 
@@ -42,11 +46,6 @@ Note that you will need to adjust the local path of the git repo and the docker
     ```
     git config --global --add safe.directory /root/code/git.ourworld.tf/tfgrid/info_tfgrid
     ```
-  - Set your name and email to be able to push changes
-    ```
-    git config --global user.email "you@example.com"
-    git config --global user.name "Your Name"
-    ```
 - You can now use Hero normally, e.g. with **projectinca**
   - With a URL:
     ```