Fix litestream showing as "not running" in Docker

When deploying litestream-ruby via Kamal and Docker, the dashboard shows the process as not running.
Using the "x" option for "ps" seems to solve this.

As per ps man page:
x      Lift the BSD-style "must have a tty" restriction, which is
       imposed upon the set of all processes when some BSD-style
       (without "-") options are used or  when  the  ps
       personality  setting  is  BSD-like.   The  set  of
       processes  selected  in this manner is in addition to the
       set of processes selected by other means.

       An alternate description is that this option causes ps to
       list all processes owned by you (same EUID as ps), or to
       list all processes when used together with the a option.

Resolves: #43

Author: AxelTheGerman

lib/litestream.rb

@@ -115,7 +115,7 @@ def replicate_process
           end
         end
       else
-        litestream_replicate_ps = `ps -a | grep litestream | grep replicate`.chomp
+        litestream_replicate_ps = `ps -ax | grep litestream | grep replicate`.chomp
         litestream_replicate_ps.split("\n").each do |line|
           next unless line.include?("litestream replicate")
           pid, * = line.split(" ")

test/test_litestream.rb

@@ -41,7 +41,7 @@ def test_replicate_process_ps
 
     stubbed_backticks = proc do |arg|
       case arg
-      when "ps -a | grep litestream | grep replicate"
+      when "ps -ax | grep litestream | grep replicate"
         stubbed_ps_list
       when %(ps -o "state,lstart" 40364)
         stubbed_ps_status