Solved : long boot time Home Assistant/Docker on Synology

After changing

default_config:

To

automation:
#cloud:
config:
frontend:
history:
logbook:
map:
#mobile_app:
person:
script:
ssdp:
sun:
system_health:
#updater:
zeroconf:

in configuration.yaml I increased the boot time from 25-35 min to almost instant.