Using crudini for configuration merging

app.ini.template

@@ -2,7 +2,9 @@ APP_NAME = Gitea
 RUN_USER = git
 RUN_MODE = prod
 
+
 [database]
+; those settings are protected and can't be modified
 DB_TYPE = mysql
 HOST = ##MYSQL_HOST:##MYSQL_PORT
 NAME = ##MYSQL_DATABASE
@@ -11,7 +13,9 @@ PASSWD = ##MYSQL_PASSWORD
 SSL_MODE = disable
 PATH =
 
+
 [server]
+; those settings are protected and can't be modified
 PROTOCOL = http
 DOMAIN = ##DOMAIN
 ROOT_URL = https://%(DOMAIN)s/
@@ -20,55 +24,74 @@ HTTP_PORT = 3000
 DISABLE_SSH = ##DISABLE_SSH
 SSH_PORT = ##SSH_PORT
 APP_DATA_PATH = /app/data/appdata
+
 ; Landing page for non-logged users, can be "home" or "explore"
 LANDING_PAGE = explore
 
+
 [repository]
+; this setting is protected and can't be modified
 ROOT = /app/data/repository
+
 SCRIPT_TYPE = bash
 
+
 [repository.upload]
 ENABLED = true
+
+; this setting is protected and can't be modified
 TEMP_PATH = /run/gitea/tmp/uploads
 
+
 [release.attachment]
 ENABLED = true
 ; APP_DATA_PATH/attachments
 PATH =
 
+
 [mailer]
 ENABLED = true
+
+; those settings are protected and can't be modified
 HOST = ##MAIL_SERVER:##MAIL_PORT
 USER = ##MAIL_SMTP_USERNAME
 PASSWD = ##MAIL_SMTP_PASSWORD
 FROM = ##MAIL_FROM
 SKIP_VERIFY = true
 
+
 [security]
+; those settings are protected and can't be modified
 INSTALL_LOCK = true
 SECRET_KEY = ##SECRET_KEY
 
+
 [service]
 DISABLE_REGISTRATION = false
 SHOW_REGISTRATION_BUTTON = false
 ENABLE_NOTIFY_MAIL = true
 
+
 [log]
-; Either "console", "file", "conn", "smtp" or "database", default is "console"
+; those settings are protected and can't be modified
 MODE = console
 ; used for xorm.log
 ROOT_PATH = /run/gitea
 
+
 [picture]
 ; APP_DATA_PATH/avatars
 AVATAR_UPLOAD_PATH =
 GRAVATAR_SOURCE = gravatar
 DISABLE_GRAVATAR = false
 
+
 [attachment]
 ENABLE = true
 ; APP_DATA_PATH/attachments
 PATH =
 
+
 [indexer]
+; this setting is protected and can't be modified
 ISSUE_INDEXER_PATH = /app/data/appdata/indexers/issues.bleve