Nextcloud on Synology (Libreoffice in Docker)

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Feature request

Which Nextcloud Version are you currently using:
32.0.5

Is your feature request related to a problem? Please describe.

Nextcloud is installed natively on a Synology NAS, while LibreOffice is running inside a Docker container. Because of this setup, it is not possible to directly reference the LibreOffice executable from the Nextcloud configuration. As a result, Nextcloud cannot find or execute the LibreOffice binary for document conversion and preview generation, which breaks integration features relying on LibreOffice.

Describe the solution you'd like

Provide a manually configurable option in Nextcloud (especially for Flow and preview generation) to connect to a LibreOffice instance running inside a Docker container via an HTTP-based conversion service. Administrators should be able to define the service endpoint (IP/hostname and port), allowing Flow workflows and preview generation to use the containerized LibreOffice instance without requiring direct access to a local executable binary.

Describe alternatives you've considered

Installing LibreOffice directly on the Synology NAS host was considered, but this is not officially supported or technically feasible in a stable and maintainable way. Running LibreOffice outside of Docker is therefore not a practical option. Other workarounds such as manual conversion are not suitable for productive environments.

Additional context

None.

Start by reviewing how the project currently connects Flow and preview generation to LibreOffice and identify the relevant conversion entry points. Define the configuration path for an HTTP service endpoint, then verify that both workflows can use a containerized LibreOffice instance without requiring a local executable.