Add option to skip timestamps on logging output

So it is easier to follow live when you are doing debugging, especially
early days app setup when you are the only user.

test/commands/proxy_test.rb

@@ -77,6 +77,12 @@ class CommandsProxyTest < ActiveSupport::TestCase
       new_command.logs(lines: 10).join(" ")
   end
 
+  test "proxy logs without timestamps" do
+    assert_equal \
+      "docker logs kamal-proxy  2>&1",
+      new_command.logs(timestamps: false).join(" ")
+  end
+
   test "proxy logs with grep hello!" do
     assert_equal \
       "docker logs kamal-proxy --timestamps 2>&1 | grep 'hello!'",