There are a few ways to use the Firefly III Data Importer (FIDI) and Docker. There are some gotchas when it comes to Docker and IP addresses, so please check out the instructions at the bottom of the page.
FIDI uses the Firefly III API. Read more about the API in the Firefly III documentation.
You should really read the configuration page first, to know which variables you need.
To run FIDI, use the following run command. How to get the the values of the variables is explained on the configuration page.
docker run \ --rm \ -e FIREFLY_III_ACCESS_TOKEN=(here) \ -e FIREFLY_III_URL=(here) \ -e NORDIGEN_ID=(here) \ -e NORDIGEN_KEY=(here) \ -e SPECTRE_APP_ID=(here) \ -e SPECTRE_SECRET=(here) \ -p 8081:8080 \ fireflyiii/data-importer:latest
By running this script, you will start a web server on port 8081 that will allow you to use FIDI. You should append the command with your Personal Access Token and Firefly III URL. You should really read the configuration page on how to get these values.
All environment variables are optional, but conventient.
docker run to
docker run -d to make sure the image runs in the background.