allow configuring number of logs to tail

docs/Config.md

@@ -38,7 +38,8 @@ gui:
   expandFocusedSidePanel: false
 logs:
   timestamps: false
-  since: '60m'
+  since: '60m' # set to '' to show all logs
+  tail: '' # set to 200 to show last 200 lines of logs
 commandTemplates:
   dockerCompose: docker-compose
   restartService: '{{ .DockerCompose }} restart {{ .Service.Name }}'

pkg/config/app_config.go

@@ -324,6 +324,7 @@ type CustomCommand struct {
 type LogsConfig struct {
 	Timestamps bool   `yaml:"timestamps,omitempty"`
 	Since      string `yaml:"since,omitempty"`
+	Tail       string `yaml:"tail,omitempty"`
 }
 
 // GetDefaultConfig returns the application default configuration NOTE (to
@@ -359,6 +360,7 @@ func GetDefaultConfig() UserConfig {
 		Logs: LogsConfig{
 			Timestamps: false,
 			Since:      "60m",
+			Tail:       "",
 		},
 		CommandTemplates: CommandTemplatesConfig{
 			DockerCompose:            "docker-compose",

pkg/gui/container_logs.go

@@ -110,6 +110,7 @@ func (gui *Gui) writeContainerLogs(container *commands.Container, ctx context.Co
 		ShowStderr: true,
 		Timestamps: gui.Config.UserConfig.Logs.Timestamps,
 		Since:      gui.Config.UserConfig.Logs.Since,
+		Tail:       gui.Config.UserConfig.Logs.Tail,
 		Follow:     true,
 	})
 	if err != nil {