===== コンテナ一覧 =====
==== コマンド形式 ====
<code bash>
ps <app>
</code>

==== 実行例 ====
=== コマンド ===
<code bash>
dokku ps ruby-getting-started
</code>

=== 出力結果 ===
<code>
 !     Deprecated: Please use ps:report
-----> running processes in container: 36f09d53f29499a42545b3d180315ac2f14e347314d295f937609f7bf189038b
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0   4668     0 ?        Ssl  Sep15   0:01 /start web
herokui+     8  0.0  2.3 296272 46984 ?        Sl   Sep15   0:14 puma 3.11.2 (tcp://0.0.0.0:5000) [app]          /puma.rb
herokui+   169  0.0  2.4 843308 50336 ?        Sl   Sep15   0:16 puma: cluster worker 1: 8 [app]                 /puma.rb
herokui+   185  0.0  2.4 843176 49256 ?        Sl   05:23   0:04 puma: cluster worker 0: 8 [app]                 /puma.rb
root       199  101  0.0   4624   832 pts/0    Ss+  10:12   0:01 /bin/sh -c ps auxwww
root       204  0.0  0.1  34396  2888 pts/0    R+   10:12   0:00 ps auxwww
</code>