readme update

Author: tonyalaribe

README.md

@@ -9,12 +9,13 @@ This way, timefusion is used as a compute and cache engine, not primary data sto
 
 Timefusion can be configured using the following environment variables:
 
-| Variable | Description | Default |
-|----------|-------------|---------|
-| `PORT` | HTTP server port | `80` |
-| `PGWIRE_PORT` | PostgreSQL wire protocol port | `5432` |
-| `AWS_S3_BUCKET` | AWS S3 bucket name | Required |
-| `AWS_S3_ENDPOINT` | AWS S3 endpoint URL | `https://s3.amazonaws.com` |
-| `QUEUE_DB_PATH` | Path to the persistent queue database | `/app/queue_db` |
+| Variable              | Description                   | Default                    |
+| --------------------- | ----------------------------- | -------------------------- |
+| `PORT`                | HTTP server port              | `80`                       |
+| `PGWIRE_PORT`         | PostgreSQL wire protocol port | `5432`                     |
+| `AWS_S3_BUCKET`       | AWS S3 bucket name            | Required                   |
+| `AWS_S3_ENDPOINT`     | AWS S3 endpoint URL           | `https://s3.amazonaws.com` |
+| AWS_ACCESS_KEY_ID     | AWS access key                | -                          |
+| AWS_SECRET_ACCESS_KEY | AWS secret key                | -                          |
 
 For local development, you can set `QUEUE_DB_PATH` to a location in your development environment.