Move a2wsgi to base dependencies and update docs accordingly

README.md

@@ -3,7 +3,7 @@
 </p>
 
 <p align="center">
-<em>An ASGI web server, for Python.</em>
+<em>An ASGI first web server, for Python.</em>
 </p>
 
 ---
@@ -15,14 +15,16 @@
 
 **Requirements**: Python 3.7+ (For Python 3.6 support, install version 0.16.0.)
 
-Uvicorn is an ASGI web server implementation for Python.
+Uvicorn is an ASGI first web server implementation for Python.
 
 Until recently Python has lacked a minimal low-level server/application interface for
 async frameworks. The [ASGI specification][asgi] fills this gap, and means we're now able to
 start building a common set of tooling usable across all async frameworks.
 
 Uvicorn supports HTTP/1.1 and WebSockets.
 
+It also comes with support to WSGI applications out of the box.
+
 ## Quickstart
 
 Install using `pip`:

docs/index.md

@@ -3,7 +3,7 @@
 </p>
 
 <p align="center">
-<em>An ASGI web server, for Python.</em>
+<em>An ASGI first web server, for Python.</em>
 </p>
 
 <p align="center">
@@ -19,14 +19,16 @@
 
 # Introduction
 
-Uvicorn is an ASGI web server implementation for Python.
+Uvicorn is an ASGI first web server implementation for Python.
 
 Until recently Python has lacked a minimal low-level server/application interface for
 async frameworks. The [ASGI specification][asgi] fills this gap, and means we're now able to
 start building a common set of tooling usable across all async frameworks.
 
 Uvicorn currently supports HTTP/1.1 and WebSockets.
 
+It also comes with support to WSGI applications out of the box.
+
 ## Quickstart
 
 Install using `pip`:
@@ -460,6 +462,25 @@ async def app(scope, receive, send):
     })
 ```
 
+## The WSGI Support
+
+Uvicorn offer support to WSGI applications throught `WSGIMiddleware` from [a2wsgi](https://github.com/abersheeran/a2wsgi)
+which converts your WSGI into ASGI application seamlessly by just running it with `--interface wsgi`
+
+Create an application, in `example.py`:
+
+```python
+def app(environ, start_response):
+    start_response('200 OK', [('Content-Type', 'text/plain')])
+    return [b'Hello World!']
+```
+
+Run the server:
+
+```shell
+$ uvicorn --interface wsgi example:app
+```
+
 ---
 
 ## Why ASGI?

mkdocs.yml

@@ -1,5 +1,5 @@
 site_name: Uvicorn
-site_description: The lightning-fast ASGI server.
+site_description: The lightning-fast ASGI first server.
 
 theme:
   name: "material"

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "uvicorn"
 dynamic = ["version"]
-description = "The lightning-fast ASGI server."
+description = "The lightning-fast ASGI first server."
 readme = "README.md"
 license = "BSD-3-Clause"
 requires-python = ">=3.7"
@@ -29,14 +29,14 @@ classifiers = [
     "Topic :: Internet :: WWW/HTTP",
 ]
 dependencies = [
+    "a2wsgi>=1.6.0,<2.0.0",
     "click>=7.0",
     "h11>=0.8",
     "typing-extensions;python_version < '3.8'",
 ]
 
 [project.optional-dependencies]
 standard = [
-    "a2wsgi>=1.6.0,<2.0.0",
     "colorama>=0.4;sys_platform == 'win32'",
     "httptools>=0.5.0",
     "python-dotenv>=0.13",