fix init_container script, fix container file ownership, add containe… #327

Job	Run time
scheduler	42s
docs	6m 28s
mpy-cross-mac	26s
mpy-cross / build (static)	21s
tests / zephyr	6m 26s
tests / run (native_mpy)	40s
mpy-cross / build (static-aarch64)	39s
mpy-cross / build (static-raspbian)	46s
tests / run (native)	46s
tests / run (mpy)	42s
tests / run (all)	1m 10s
mpy-cross / build (static-mingw)	51s
windows-zephyr	0s
windows	0s
ports	0s
	19m 57s

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