update README

Author: aaronyicongfu

README.md

@@ -8,24 +8,20 @@ The homepage can be accessed at: [smdogroup.github.io/homepage](https://smdogrou
 
 
 ## Develop
-The website is currently under development and is offline.
-But there are two ways to preview it:
-
-### 1. Build locally
-If you build for the first time, you'll install several python packages.
-This can be done by ```cd docs/source && pip install -r requirements.txt```.
-Then you can run ```docs/compile.sh``` to build the website.
-If it runs through, the main page can be accessed by opening 
-```docs/build/html/index.html```.
-
-### 2. Utilize Github action
-If you have trouble building locally, you could let github build the whole thing 
-for you.
-You'll need to push your changes to main branch, which will
-trigger the auto-deploy to branch gh-pages.
-The status can be viewed by clicking [Actions](https://github.com/smdogroup/smdo-homepage/actions).
-When it's done, run ```git checkout gh-pages``` and ```git pull```, then you should have
-the ```index.html``` in the root folder.
+Push or PR to the main branch will trigger the GitHub workflow to build and
+deploy the website, which, upon finished, can be accessed at the URL above.
+
+
+### Preview the website locally
+If you build for the first time, you'll need to install several python packages:
+```cd docs/source && pip install -r requirements.txt```
+Then you can run ```cd docs && ./compile.sh``` to build the website.
+If it runs through, host it locally
+```python -m http.server build/html```
+then visit
+```localhost:8000/```
+in your browser to preview the website locally.
+
 
 ## TODO
 - Resolve compatibility issues on mobile device