UPDATE: Default Dockerfile has been modified to use non-root user - www-data. Thus, just follow the instructions provided in README.
By default, the root user is used for WebSpellChecker deployed as a Docker container from the default image or a custom one created from the Dockerfile. You have an option to use non-root user - www-data.
www-data is the user that web servers on Ubuntu (Apache, nginx, for example) use by default for normal operation.
Below is the guidance on how to proceed with www-data user.
1. Open Dockerfile for editing. At the end of the RUN command, add the following lines:
... RUN ... mkdir -p /var/lib/wsc/license &&\ chown -R www-data:www-data /var/lib/wsc/license /var/run/apache2 /var/log/apache2 /var/lock/apache2
The first line creates a folder for the license.
The second line allows the www-data user to use the license and folders for the Apache functions.
2. Create a Docker image from the modified file.
2. Start the container using www-data user.
docker run -d -p 80:80 -u www-data webspellchecker/wproofreader