reduce task startup time for embedding job

[tmokmss]

Issue #, if available:

Description of changes:

What I did:

• Enable SOCI index
• install only chromium for playwright

Result:

• Image size is reduced by 200MB(compressed) (3900MB -> 3700MB)
• Task startup time is reduced by 80% (157s avg -> 32s avg)

I also added .prettierrc for consistent formatting, following the current format rule (I guess).

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[statefb]

• 80% of task launches were accelerated
  • The deterioration in task execution speed due to lazy loading was within an acceptable level this time (+about 10 seconds)

[statefb]

LGTM, thank you for your contribution!