No database, no additional features. Plain and simple image upload.
Simply allocate a data directory and create the thumbnails sub-directory:
mkdir -p /path/to/data/thumbnails
Then run the image server:
docker run --name=tedimg -d -v /path/to/data:/data kaiyou/tedimg
NodeJS and NPM are required to build from source :
git clone git@github.com:kaiyou/tedimg.git
cd tedimg
npm install
gulp
docker build