G'day v3ritas,

Welcome to the Monastery.

I was looking at a $work Dancer2 project this morning and recalled there was a question about this a few days ago. Here's some addional information.

$ cat config.yml
...
template: "template_toolkit"
engines:
    template:
        template_toolkit:
            START_TAG: '<%'
            END_TAG: '%>'
            PRE_CHOMP: 1
            COMPILE_EXT: '.tcc'
[download]

In brief:

• START_TAG and END_TAG are fairly self evident.
• PRE_CHOMP gets rid of lots of unwanted whitespace in the generated output.
• COMPILE_EXT caches templates.

For more detailed information on those, see Template::Manual::Config and "Dancer2::Template::TemplateToolkit - Template Caching".