py2-yaml conflict solve temporary

[Cafemug]

#147 issue temporary solved

The latest dockerfile was created in May last year

but current alpine version was created Dec last year

so i tried to build with alpine 3.8ver that was created May in last year

it's success

but i think this solution is temporary

[tao12345666333]

py2-yaml is only available in alpine: 3.10 and before.

Using 3.10 is safer than 3.8 :)