Allow audio and video upload file size settings to be specified via Docker environment variables

[fujita-h]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

Allow the following environment variables to be set from docker compose environment variables:

• UPLOAD_VIDEO_FILE_SIZE_LIMIT
• UPLOAD_AUDIO_FILE_SIZE_LIMIT

2. Additional context or comments

No response

3. Can you help us with this feature?

• I am interested in contributing to this feature.