Update README.md

Author: tony-xlh

README.md

@@ -1,7 +1,25 @@
 ## Dynamic Web TWAIN Documentation
 
-This project is to store DWT documentation.
+This project is to store [Dynamic Web TWAIN](https://www.dynamsoft.com/web-twain/overview/)'s documentation. The main official documentation website is hosted at <https://www.dynamsoft.com/web-twain/docs/introduction/index.html>.
+
+### Local Development
+
+1. Download the docs template repo and the Web TWAIN docs repo with [download-dwt.sh](https://github.com/tony-xlh/misc/raw/refs/heads/main/build-docs/download-dwt.sh).
+2. Install Ruby and Jekyll.
+3. Go to the docs' folder and install dependencies.
+
+   ```bash
+   bundle install
+   ```
+
+4. Serve the Site.
+
+   ```bash
+   bundle exec jekyll serve -P 5555 --trace --host=0.0.0.0
+   ```
+
+### License
+
+All documentation is available under the terms of [CC BY-SA 3.0](https://creativecommons.org/licenses/by-sa/3.0/).
 
-Set up with
 
-https://docs.github.com/en/enterprise/2.14/user/articles/setting-up-your-github-pages-site-locally-with-jekyll