brutalinks: Registration or submission fails: Error: Post "/outbox": unsupported protocol scheme ""

Call to client.ToCollection() are not including the fedbox hostname in the URL argument, resulting in http client requests failing.

littr .env:

# HOSTNAME is used as the base for the absolute URLs in the site
HOSTNAME=littr.brokedown.net
# LISTEN_PORT is the port number that the application will listen on for connections
LISTEN_PORT=3000
# LISTEN_HOST is the host/ip that the application will listen on for connections
LISTEN_HOSTNAME=littr
# ENV the environment type sets different configuration settings, valid are: DEV, QA, STAGING, PROD
ENV=DEV
# API_URL is the url of the fedbox instance that provides our C2S ActivityPub API
API_URL=http://fedbox.local
# SESS_AUTH_KEY is used for encrypting the session data
SESS_AUTH_KEY=1234567890123456
# SESS_ENC_KEY
SESS_ENC_KEY=6543210987654321
# OAUTH2_KEY the default OAuth2 key used by the frontend to connect to the C2S ActivityPub end-points
OAUTH2_KEY=8b80de04-b72b-455f-aab3-4cada26e47c5
# OAUTH2_SECRET the default OAuth2 secret used by the frontend
OAUTH2_SECRET=server
# SESSIONS_BACKEND the backend to use for session storage, valid: cookie, fs
SESSIONS_BACKEND=cookie
# DISABLE_SESSIONS setting this to true, makes the instance essentially read only, by disallowing user logins
DISABLE_SESSIONS=false
# DISABLE_DOWNVOTING disables allowing Dislike activities
DISABLE_DOWNVOTING=false
# DISABLE_VOTING disables all Like/Dislike activities
DISABLE_VOTING=false

fedbox .env:

HOSTNAME=fedbox.local
LISTEN=fedbox.local:80
ENV=dev
STORAGE=fs
STORAGE_PATH=/tmp/data/fedbox

Environment is a docker container with hosts entries for littr resolving to container’s IP and others resolving to 127.0.0.1.