update DEVELOPMENT.md

- bump version of ruby container to use
- simplify installation process
- formatting

DEVELOPMENT.md

@@ -1,16 +1,13 @@
 Running a development server locally using podman/python:
 
-- make sure _config.yml has "http://localhost:8000" as the site URL
+1. make sure `_config.yml` has "http://localhost:8000" as the site URL
 
-in one terminal:
-- podman run -it -v .:/mnt:Z docker.io/ruby:3.3.0-bookworm /bin/bash
-  - cd /mnt
-  - bundle install
-  - cd dogwood
-  - bundle install
-  - cd ..
-  - bundle exec jekyll build --watch
+2. In one terminal:
+   - `podman run -it -v .:/mnt:Z docker.io/ruby:3.3.4-bookworm /bin/bash`
+   - `cd /mnt`
+   - `bundle install`
+   - `bundle exec jekyll build --watch`
 
-in a new terminal while that's running
-- cd to ~/Documents/maprva-site/_site
-- python -m http.server
+   In a new terminal while that's running:
+   - `cd` to `/path/to/repo/_site`
+   - `python -m http.server`