✨(feat) update storage to support S3 and R2 integration

[RajikaKeminda]

This pull request refactors the configuration for AWS services and introduces support for S3-compatible storage services like Cloudflare R2. The changes involve updating environment variables, modifying service classes to use the new configuration structure, and adding a dedicated configuration section for S3.

Configuration Updates:

• api-backend/.env.example: Added new environment variables for S3-compatible storage (S3_ACCESS_KEY, S3_SECRET_KEY, S3_ENDPOINT_URL, S3_BUCKET_NAME, and S3_REGION) and removed AWS_BUCKET_REGION and AWS_MEETING_BOT_BUCKET_NAME.

• api-backend/src/config/configuration.ts: Updated the aws configuration object to replace bucketRegion with region and removed meetingBotBucketName. Added a new s3 configuration object to handle S3-specific settings.

Service Class Modifications:

• api-backend/src/aws/aws.service.ts: Updated the AwsService class to use the new s3 configuration for S3-compatible storage, including endpoint, accessKey, secretKey, region, and bucketName. [1] [2]

• api-backend/src/aws/ecs.service.ts: Modified the ECSClientService class to use the updated aws.region configuration instead of the removed aws.bucketRegion.

[github-actions]

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