Create S3 bucket to hold static assets

blog_staticwebsite_s3.tf

resource "aws_s3_bucket" "main" {
...
  policy   = data.aws_iam_policy_document.bucket_policy.json
  website {
    index_document = var.index_document
  }
...
data "aws_iam_policy_document" "bucket_policy" {
  ...
    actions = [
      "s3:GetObject",
  ...
}