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Hollo

Environment variables

Hollo is configured using environment variables. You can set them in an .env file in the root directory of the project, or you can set them using Docker’s -e/--env option or Railway’s environment variables.

PORT Optional Unused in Railway

The port number to listen on. 3000 by default.

DATABASE_URL Unused in Railway

The URL of the PostgreSQL database, e.g., postgresql://hollo:password@localhost/hollo.

HOME_URL Optional

If present, the home page will redirect to this URL. If not set, the home page will show the list of accounts on the instance.

SECRET_KEY Unused in Railway

The secret key for securing the session. You can generate a random secret key using the following command:

openssl rand -hex 32

REMOTE_ACTOR_FETCH_POSTS Optional

The number of recent public posts to fetch from remote actors when they are encountered first time.

10 by default.

LOG_LEVEL Optional

The log level for the application. debug, info, warning, error, and fatal are available.

info by default.

LOG_QUERY Optional

Set this to true to log SQL queries.

Turned off by default.

BEHIND_PROXY Optional Unused in Railway

Set this to true if Hollo is behind a reverse proxy. If you place the Hollo behind an L7 load balancer (you usually should do this), turn this on.

Turned off by default.

ALLOW_PRIVATE_ADDRESS Optional

Setting this to true disables SSRF (Server-Side Request Forgery) protection.

Turn on to test in local network.

Turned off by default.

S3_REGION Optional

The region of the S3-compatible object storage, e.g., us-east-1. On some non-S3 services, this can be omitted. auto by default.

S3_BUCKET

The bucket name of the S3-compatible object storage, e.g., hollo.

S3_URL_BASE

The public URL base of the S3-compatible object storage, e.g., https://hollo.s3.us-east-1.amazonaws.com.

S3_ENDPOINT_URL

The endpoint URL for S3-compatible object storage, e.g., https://s3.us-east-1.amazonaws.com.

S3_FORCE_PATH_STYLE

Whether to force path-style URLs for S3-compatible object storage. true to turn on, false to turn off. Useful for non-AWS S3-compatible services. Turned off by default.

AWS_ACCESS_KEY_ID

The access key for S3-compatible object storage.

AWS_SECRET_ACCESS_KEY

The secret key for S3-compatible object storage