### Download and Install/Run

Fess 15.0 is now available and can be downloaded on the [Releases page](https://github.com/codelibs/fess/releases "download"). Downloads come in 3 flavors: deb, rpm, zip.

The following commands show how to use the zip download:

    $ unzip fess-15.0.x.zip
    $ cd fess-15.0.x
    $ ./bin/fess

For more details, see the [Installation Guide](https://fess.codelibs.org/15.0/install/index.html).

### Docker

---

"_I’m over the moon excited about **FastAPI**. It’s so fun!_"

<div style="text-align: right; margin-right: 10%;">Brian Okken - <strong><a href="https://pythonbytes.fm/episodes/show/123/time-to-right-the-py-wrongs?time_in_sec=855" target="_blank">Python Bytes</a> podcast host</strong> <a href="https://x.com/brianokken/status/1112220079972728832" target="_blank"><small>(ref)</small></a></div>

---

                               aria-controls="listSearchForm"><i class="fas fa-search" aria-hidden="true"></i></a>
                            <div class="collapse <c:if test="${!empty term || !empty query}">show</c:if>" id="listSearchForm">
                                <la:form action="/admin/keymatch/">
                                    <div class="form-group row">

                               aria-controls="listSearchForm"><i class="fas fa-search" aria-hidden="true"></i></a>
                            <div class="collapse <c:if test="${!empty term || !empty content}">show</c:if>" id="listSearchForm">
                                <la:form action="/admin/relatedcontent/">
                                    <div class="form-group row">

.nav-link:focus,.dark-mode .nav-tabs .nav-link:hover{border-color:#56606a}.dark-mode .nav-tabs .nav-item.show .nav-link,.dark-mode .nav-tabs .nav-link.active{background-color:#343a40;border-color:#56606a #56606a transparent #56606a;color:#fff}.dark-mode .nav-tabs.flex-column .nav-item.show .nav-link.active,.dark-mode .nav-tabs.flex-column .nav-item.show .nav-link:focus,.dark-mode .nav-tabs.flex-column .nav-item.show .nav-link:hover,.dark-mode .nav-tabs.flex-column .nav-link.active,.dark-mode .nav-tabs.flex-column...

/// info

Read more about tags in [Path Operation Configuration](path-operation-configuration.md#tags){.internal-link target=_blank}.

///

### Check the docs { #check-the-docs }

Now, if you check the docs, they will show all the additional metadata:

<img src="/img/tutorial/metadata/image02.png">

### Order of tags { #order-of-tags }

The order of each tag metadata dictionary also defines the order shown in the docs UI.

## Lifespan { #lifespan }

You can define this *startup* and *shutdown* logic using the `lifespan` parameter of the `FastAPI` app, and a "context manager" (I'll show you what that is in a second).

Let's start with an example and then see it in detail.

We create an async function `lifespan()` with `yield` like this:

{* ../../docs_src/events/tutorial003.py hl[16,19] *}

		if cs[j].before == "*" && cs[i].before != "*" {
			return true
		}
		if cs[j].after == "*" && cs[i].after != "*" {
			return true
		}
		return false
	})

	for _, c := range cs {
		// show warning message the callback name already exists
		if idx := getRIndex(names, c.name); idx > -1 && !c.replace && !c.remove && !cs[idx].remove {

        }

        return masked;
    }

    private String maskUsername(String username) {
        if (!maskSensitiveData || username == null) {
            return username;
        }

        // Show first and last character only
        if (username.length() <= 2) {
            return "***";
        }

        return username.charAt(0) + "***" + username.charAt(username.length() - 1);
    }

```console
$ cd docs/en/
```

Then run `mkdocs` in that directory:

```console
$ mkdocs serve --dev-addr 127.0.0.1:8008
```

///

#### Typer CLI (optional)

The instructions here show you how to use the script at `./scripts/docs.py` with the `python` program directly.