Don't generate OnlyOffice fonts on startup

See https://0xacab.org/infrared/platform_wg/docker-onlyoffice-documentserver/issues/10

After 5.4.1-2 is released we need to set the SKIP_FONTS_GENERATION=true env value to disable font generation.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information