Clarify the logger's MODE config option (#26267) (#26281)

Backport #26267 by @wxiaoguang

1. Fix the wrong document (add the missing `MODE=`)
2. Add a more friendly log message to tell users to add `MODE=` in their
config

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

docs/content/administration/logging-config.en-us.md

@@ -102,8 +102,11 @@ MODE = file, file-error
 
 ; by default, the "file" mode will record logs to %(log.ROOT_PATH)/gitea.log, so we don't need to set it
 ; [log.file]
+; by default, the MODE (actually it's the output writer of this logger) is taken from the section name, so we don't need to set it either
+; MODE = file
 
 [log.file-error]
+MODE = file
 LEVEL = Error
 FILE_NAME = file-error.log
 ```

docs/content/installation/from-package.en-us.md

@@ -40,7 +40,7 @@ apk add gitea
 
 ## Arch Linux
 
-The rolling release distribution has [Gitea](https://www.archlinux.org/packages/community/x86_64/gitea/) in their official community repository and package updates are provided with new Gitea releases.
+The rolling release distribution has [Gitea](https://www.archlinux.org/packages/extra/x86_64/gitea/) in their official extra repository and package updates are provided with new Gitea releases.
 
 ```sh
 pacman -S gitea

modules/setting/log.go

@@ -165,7 +165,7 @@ func loadLogModeByName(rootCfg ConfigProvider, loggerName, modeName string) (wri
 		writerMode.WriterOption = writerOption
 	default:
 		if !log.HasEventWriter(writerType) {
-			return "", "", writerMode, fmt.Errorf("invalid log writer type (mode): %s", writerType)
+			return "", "", writerMode, fmt.Errorf("invalid log writer type (mode): %s, maybe it needs something like 'MODE=file' in [log.%s] section", writerType, modeName)
 		}
 	}
 

templates/repo/issue/view_content/sidebar.tmpl

@@ -362,7 +362,7 @@
 				<div class="gt-df gt-sb gt-ac">
 					<div class="due-date {{if .Issue.IsOverdue}}text red{{end}}" {{if .Issue.IsOverdue}}data-tooltip-content="{{.locale.Tr "repo.issues.due_date_overdue"}}"{{end}}>
 						{{svg "octicon-calendar" 16 "gt-mr-3"}}
-						{{DateTime "long" .Issue.DeadlineUnix}}
+						{{DateTime "long" .Issue.DeadlineUnix.FormatDate}}
 					</div>
 					<div>
 						{{if and .HasIssuesOrPullsWritePermission (not .Repository.IsArchived)}}