ap.leg.br
ap.ngrok.io
aparecida.br
apartments
api.gov.uk
api.stdlib.com
apigee.io
app
app-ionos.space
app.br
app.os.fedoraproject.org
app.os.stg.fedoraproject.org
app.render.com
appchizi.com
appengine.flow.ch
apple
applinzi.com
apps-1and1.com
apps-1and1.net
apps.fbsbx.com
apps.lair.io
appspacehosted.com
appspaceusercontent.com
appspot.com
appudo.net
aq
aq.it

### Create it { #create-it }

Create a file `main.py` with:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">

  url: https://github.com/YuriiMotov
- login: github-actions
  count: 769
  avatarUrl: https://avatars.githubusercontent.com/in/15368?v=4
  url: https://github.com/apps/github-actions
- login: Kludex
  count: 654
  avatarUrl: https://avatars.githubusercontent.com/u/7353520?u=df8a3f06ba8f55ae1967a3e2d5ed882903a4e330&v=4
  url: https://github.com/Kludex
- login: jgould22
  count: 263

    - [Network](#network)
  - [Before Upgrading](#before-upgrading)
  - [Known Issues](#known-issues)
  - [Deprecations](#deprecations)
  - [Other Notable Changes](#other-notable-changes-13)
    - [Apps](#apps)
    - [AWS](#aws)
    - [Auth](#auth-1)
    - [CLI](#cli-1)
    - [Cluster Lifecycle](#cluster-lifecycle)
    - [GCP](#gcp)
    - [Instrumentation](#instrumentation)
    - [Node](#node-1)

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY ./app /code/app

# (1)!
CMD ["fastapi", "run", "app/main.py", "--port", "80", "--workers", "4"]
```

1. Here we use the `--workers` command line option to set the number of workers to 4.

Here are some examples of when that could make sense:

#### A Simple App { #a-simple-app }

   * href="http://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x/conf/mime.types"></a> of the
   * Apache <a href="http://httpd.apache.org/">HTTPD project</a>; for the specification, see <a
   * href="http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/PhotoshopFileFormats.htm">
   * Adobe Photoshop Document Format</a> and <a
   * href="http://en.wikipedia.org/wiki/Adobe_Photoshop#File_format">Wikipedia</a>; this is the

  - [New Features](#new-features)
  - [API Changes](#api-changes)
  - [Other Notable Changes](#other-notable-changes-10)
    - [SIG API Machinery](#sig-api-machinery-1)
    - [SIG Apps](#sig-apps)
    - [SIG Auth](#sig-auth)
    - [SIG Autoscaling](#sig-autoscaling-1)
    - [SIG AWS](#sig-aws)
    - [SIG Azure](#sig-azure-1)
    - [SIG CLI](#sig-cli-1)
    - [SIG Cloud Provider](#sig-cloud-provider-1)

      - [Graduated to Beta](#graduated-to-beta)
    - [New alpha features](#new-alpha-features)
  - [Other Notable Changes](#other-notable-changes-10)
    - [SIG API Machinery](#sig-api-machinery-1)
    - [SIG Apps](#sig-apps)
    - [SIG Auth](#sig-auth-1)
    - [SIG Autoscaling](#sig-autoscaling)
    - [SIG Azure](#sig-azure)
    - [SIG CLI](#sig-cli-1)
    - [SIG Cluster Lifecycle](#sig-cluster-lifecycle-1)

interacting with the system. Note: the GUI is enabled by default in 1.2 clusters.

<img src="docs/images/newgui.png" width="" alt="Dashboard UI screenshot showing cards that represent applications that run inside a cluster" title="Dashboard UI apps screen">

### Other notable improvements

  * Job was Beta in 1.1 and is GA in 1.2 .

* Introduce apps/v1beta1.Deployments resource with modified defaults compared to extensions/v1beta1.Deployments. ([#39683](https://github.com/kubernetes/kubernetes/pull/39683), [@soltysh](https://github.com/soltysh))
* Introduce new generator for apps/v1beta1 deployments ([#42362](https://github.com/kubernetes/kubernetes/pull/42362), [@soltysh](https://github.com/soltysh))