added some scenarios

.gitpod.yml

@@ -6,3 +6,7 @@ ports:
     onOpen: open-preview
 tasks:
   - command: echo "This is an learning environment for flask"
+
+vscode:
+  extensions:
+    - "ms-python.python"
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.learn/01-routing.md

+# 01 - Routing
+
+Modern web applications use meaningful URLs to help users. Users are more likely to like a page and come back if the page uses a meaningful URL they can remember and use to directly visit a page.
+
+Use the **route()** decorator to bind a function to a URL.
+```
+@app.route('/')
+def index():
+    return 'Index Page'
+
+@app.route('/hello')
+def hello():
+    return 'Hello, World'
+```
+
+## Variable Rules
+You can add variable sections to a URL by marking sections with `<variable_name>`. Your function then receives the `<variable_name>` as a keyword argument. Optionally, you can use a converter to specify the type of the argument like `<converter:variable_name>`.
+
+```
+from markupsafe import escape
+
+@app.route('/user/<username>')
+def show_user_profile(username):
+    # show the user profile for that user
+    return 'User %s' % escape(username)
+
+@app.route('/post/<int:post_id>')
+def show_post(post_id):
+    # show the post with the given id, the id is an integer
+    return 'Post %d' % post_id
+
+@app.route('/path/<path:subpath>')
+def show_subpath(subpath):
+    # show the subpath after /path/
+    return 'Subpath %s' % escape(subpath)
+```
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.learn/02-renderingTemplates.md

+https://flask.palletsprojects.com/en/1.1.x/quickstart/
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