Upgrade framework from 1.3.0 to 1.8 ?

[Draky50110]

Hello.

Docker image provides framework 1.3 but as last is 1.8, can't install extensions like french language pack.

Could you update the docker image ?

Thanks.

PS : same as #122 but it was clsoed without explanations.

[xfoxfu]

I think stable is v1.3 but latest is v1.8.