feat: allow tailing a specific number of log lines

README.md

@@ -40,7 +40,7 @@ redis:link <service> <app> [--link-flags...]       # link the redis service to t
 redis:linked <service> <app>                       # check if the redis service is linked to an app
 redis:links <service>                              # list all apps linked to the redis service
 redis:list                                         # list all redis services
-redis:logs <service> [-t|--tail]                   # print the most recent log(s) for this service
+redis:logs <service> [-t|--tail] <tail-num-optional> # print the most recent log(s) for this service
 redis:promote <service> <app>                      # promote service <service> as REDIS_URL in <app>
 redis:restart <service>                            # graceful shutdown and restart of the redis service container
 redis:start <service>                              # start a previously stopped redis service
@@ -153,12 +153,12 @@ dokku redis:list
 
 ```shell
 # usage
-dokku redis:logs <service> [-t|--tail]
+dokku redis:logs <service> [-t|--tail] <tail-num-optional>
 ```
 
 flags:
 
-- `-t|--tail`: do not stop when end of the logs are reached and wait for additional output
+- `-t|--tail [<tail-num>]`: do not stop when end of the logs are reached and wait for additional output
 
 You can tail logs for a particular service:
 
@@ -172,6 +172,12 @@ By default, logs will not be tailed, but you can do this with the --tail flag:
 dokku redis:logs lollipop --tail
 ```
 
+The default tail setting is to show all logs, but an initial count can also be specified:
+
+```shell
+dokku redis:logs lollipop --tail 5
+```
+
 ### link the redis service to the app
 
 ```shell