update(): alpine 3.10

merge(): branch 'michael-k-patch-1' into master

chore(): update to alpine 3.8

feat(): add memory limit variable #17

docs(): update readme

Merge pull request #15 from Franselbaer/master

and forgot to add nginx.conf

forgot to escape slashes

typo correction

Adding switch to activate log to STDOUT

perf(): assets cache and php perf improvement

merge(): pull request #12 from navossoc/master

Add PostgreSQL support.

Update postfixadmin-change-password plugin.

fix(): plugin copy error