Bug: using domain for mysql ,the docker not started

Steps to reproduce the behavior

• change config.json
• "dbtype": "mysql",
• "dbconfig": "boards:boards@abc.dba.com:3306/boards",

Expected behavior

docker run -d -p 1002:8000 -v /root/board/config.json:/opt/focalboard/config.json --name focalboard mattermost/focalboard

Screenshots

2021/12/31 10:58:33 readConfigFile 2021/12/31 10:58:33 {ServerRoot:http://localhost:8000 Port:8000 DBType:mysql DBConfigString:boards:boards@abc.dba.com:3306/boards DBTablePrefix: UseSSL:false SecureCookie:false WebPath:./pack FilesDriver:local FilesS3Config:{AccessKeyID: SecretAccessKey: Bucket: PathPrefix: Region: Endpoint: SSL:false SignV2:false SSE:false Trace:false} FilesPath:/data/files Telemetry:true TelemetryID: PrometheusAddress: WebhookUpdate:[] Secret: SessionExpireTime:2592000 SessionRefreshTime:18000 LocalOnly:false EnableLocalMode:true LocalModeSocketLocation:/var/tmp/focalboard_local.socket EnablePublicSharedBoards:false FeatureFlags:map[] AuthMode:native LoggingCfgFile: LoggingCfgJSON: AuditCfgFile: AuditCfgJSON: NotifyFreqCardSeconds:0 NotifyFreqBoardSeconds:0} info [2021-12-31 10:58:33.865 Z] FocalBoard Server caller="main/main.go:56" version=0.12.0 edition=linux build_number=dev build_date=n/a build_hash=b583bae668257519097fced9338c7cdc7013fc77 error [2021-12-31 10:58:33.865 Z] connectDatabase failed caller="server/server.go:212" error="default addr for network 'rm-2zejx4x5fn564q9644o.mysql.rds.aliyuncs.com:3306/boards?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=Asia' unknown" fatal [2021-12-31 10:58:33.865 Z] server.NewStore ERROR caller="main/main.go:145" error="default addr for network 'rm-2zejx4x5fn564q9644o.mysql.rds.aliyuncs.com:3306/boards?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&serverTimezone=Asia' unknown" main.main /go/src/focalboard/server/main/main.go:145 runtime.main /usr/local/go/src/runtime/proc.go:225 runtime.goexit /usr/local/go/src/runtime/asm_amd64.s:1371