Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

```
git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash
```

Closes #11925

docs/content/en/commands/hugo_server.md

@@ -0,0 +1,98 @@
+---
+title: "hugo server"
+slug: hugo_server
+url: /commands/hugo_server/
+---
+## hugo server
+
+A high performance webserver
+
+### Synopsis
+
+Hugo provides its own webserver which builds and serves the site.
+While hugo server is high performance, it is a webserver with limited options.
+
+'hugo server' will avoid writing the rendered and served content to disk,
+preferring to store it in memory.
+
+By default hugo will also watch your files for any changes you make and
+automatically rebuild the site. It will then live reload any open browser pages
+and push the latest content to them. As most Hugo sites are built in a fraction
+of a second, you will be able to save and see your changes nearly instantly.
+
+```
+hugo server [command] [flags]
+```
+
+### Options
+
+```
+      --appendPort             append port to baseURL (default true)
+  -b, --baseURL string         hostname (and path) to the root, e.g. https://spf13.com/
+      --bind string            interface to which the server will bind (default "127.0.0.1")
+  -D, --buildDrafts            include content marked as draft
+  -E, --buildExpired           include expired content
+  -F, --buildFuture            include content with publishdate in the future
+      --cacheDir string        filesystem path to cache directory
+      --cleanDestinationDir    remove files from destination not found in static directories
+  -c, --contentDir string      filesystem path to content directory
+      --disableBrowserError    do not show build errors in the browser
+      --disableFastRender      enables full re-renders on changes
+      --disableKinds strings   disable different kind of pages (home, RSS etc.)
+      --disableLiveReload      watch without enabling live browser reload on rebuild
+      --enableGitInfo          add Git revision, date, author, and CODEOWNERS info to the pages
+      --forceSyncStatic        copy all files when static is changed.
+      --gc                     enable to run some cleanup tasks (remove unused cache files) after the build
+  -h, --help                   help for server
+      --ignoreCache            ignores the cache directory
+  -l, --layoutDir string       filesystem path to layout directory
+      --liveReloadPort int     port for live reloading (i.e. 443 in HTTPS proxy situations) (default -1)
+      --meminterval string     interval to poll memory usage (requires --memstats), valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h". (default "100ms")
+      --memstats string        log memory usage to this file
+      --minify                 minify any supported output format (HTML, XML etc.)
+      --navigateToChanged      navigate to changed content file on live browser reload
+      --noBuildLock            don't create .hugo_build.lock file
+      --noChmod                don't sync permission mode of files
+      --noHTTPCache            prevent HTTP caching
+      --noTimes                don't sync modification time of files
+      --panicOnWarning         panic on first WARNING log
+      --poll string            set this to a poll interval, e.g --poll 700ms, to use a poll based approach to watch for file system changes
+  -p, --port int               port on which the server will listen (default 1313)
+      --printI18nWarnings      print missing translations
+      --printMemoryUsage       print memory usage to screen at intervals
+      --printPathWarnings      print warnings on duplicate target paths etc.
+      --printUnusedTemplates   print warnings on unused templates.
+      --renderStaticToDisk     serve static files from disk and dynamic files from memory
+      --renderToDisk           serve all files from disk (default is from memory)
+      --templateMetrics        display metrics about template executions
+      --templateMetricsHints   calculate some improvement hints when combined with --templateMetrics
+  -t, --theme strings          themes to use (located in /themes/THEMENAME/)
+      --tlsAuto                generate and use locally-trusted certificates.
+      --tlsCertFile string     path to TLS certificate file
+      --tlsKeyFile string      path to TLS key file
+      --trace file             write trace to file (not useful in general)
+  -w, --watch                  watch filesystem for changes and recreate as needed (default true)
+```
+
+### Options inherited from parent commands
+
+```
+      --clock string               set the clock used by Hugo, e.g. --clock 2021-11-06T22:30:00.00+09:00
+      --config string              config file (default is hugo.yaml|json|toml)
+      --configDir string           config dir (default "config")
+      --debug                      debug output
+  -d, --destination string         filesystem path to write files to
+  -e, --environment string         build environment
+      --ignoreVendorPaths string   ignores any _vendor for module paths matching the given Glob pattern
+      --logLevel string            log level (debug|info|warn|error)
+      --quiet                      build in quiet mode
+  -s, --source string              filesystem path to read files relative from
+      --themesDir string           filesystem path to themes directory
+  -v, --verbose                    verbose output
+```
+
+### SEE ALSO
+
+* [hugo](/commands/hugo/)	 - hugo builds your site
+* [hugo server trust](/commands/hugo_server_trust/)	 - Install the local CA in the system trust store.
+