Use GitHub style code blocks in README

 
 ## Usage
 
-    mkdir example.site && cd example.site
-    poetry init --name=example-site
-    poetry add webint
-    poetry run web scaffold 
-    poetry version minor
-    poetry publish
-
-    web config --host digitalocean --token {YOUR_TOKEN}
-    web init example.site example-site example:app
+```bash
+mkdir example.site && cd example.site
+poetry init --name=example-site
+poetry add webint
+poetry run web scaffold 
+poetry version minor
+poetry publish
+
+web config --host digitalocean --token {YOUR_TOKEN}
+web init example.site example-site example:app
+```
 
 ### Hack
 
-    poetry run web run example:app --port 9999
+```bash
+poetry run web run example:app --port 9999
+```
 
 Changes to your python code will auto-reload the local development server.
 
 #### Deploy an update
 
-    poetry version (major|minor|patch)
-    poetry publish
+```bash
+poetry version (major|minor|patch)
+poetry publish
+```
 
 Wait a couple minutes and update your site at https://example.site/system/software