A question about the MPL license

Here is the background: I have been developing a web-based learning management system project and looking to integrate Collabora Online into my project.
I checked out the GitHub repository and found that the whole project is licensed under MPL 2.0 and the browser subfolder is under BSD.
My initial plan is to build the docker image from the scripts licensed under MPL 2.0, run the container with the port 9980. After Integration, my frontend part would open a docx or pptx, and a HTML would inject into a existing iframe tag.
Here is the question:
As far as I know, the HTML received from Collabora Online Server is from the browser subfolder, right?
If I only use the 9980 port and Integrate CODE into my project and nothing in the CODE is modified, do I violate the license If I close source my project?