ffsend

# Invoke without arguments
docker run --rm -it -v $(pwd):/data timvisee/ffsend

# Upload my-file.txt
docker run --rm -it -v $(pwd):/data timvisee/ffsend upload my-file.txt

# Download from specified link
docker run --rm -it -v $(pwd):/data timvisee/ffsend download https://send.vis.ee/#sample-share-url

# Show help
docker run --rm -it -v $(pwd):/data timvisee/ffsend help

# To update the used image
docker pull timvisee/ffsend

Taken from the project README. You need a server with Docker; you may still need to add environment variables.