Copy this code:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:ListAllMyBuckets",
      "Resource": "arn:aws:s3:::*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:ListBucket",
        "s3:ListBucketMultipartUploads",
        "s3:GetBucketLocation"
      ],
      "Resource": "arn:aws:s3:::@{{ bucket }}"
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:AbortMultipartUpload",
        "s3:DeleteObject",
        "s3:GetObjectAcl",
        "s3:GetObject",
        "s3:PutObjectAcl",
        "s3:PutObject"
      ],
      "Resource": "arn:aws:s3:::@{{ bucket }}/*"
    }
  ]
}