My bad, sorry. Google pagerank led me to the outdated version.

Unrelated: I am curious to know why Dancer2 is trying to open ./.dancer at startup? What can be put in it?
stat("./lib", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
stat("./bin", 0x84e238)                 = -1 ENOENT (No such file or directory)
stat("./.dancer", 0x84e238)             = -1 ENOENT (No such file or directory)

I noticed this when I was using strace to find out where Dancer2 wanted to find my config.yml. For an app Name::Name2, in lib/Name/Name2.pm, the file needs to be lib/Name/config.yml not in ./config.yml. Now I see why: there could be multiple apps, each with its own config. As described in meta (but why say that it is global?):

"Dancer2 will first look for the file config.ext (where .ext is the type of configuration file you are using) in the root directory of your application. This is considered your global Dancer2 config file.

https://metacpan.org/pod/distribution/Dancer2/lib/Dancer2/Config.pod

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