WIP: Add Euro Office (ONLYOFFICE) integration

[zerox80]

Add Euro Office (ONLYOFFICE) integration

Summary

• Add Euro Office as a first-class web office option alongside Collabora
• Support for both Traefik and external reverse proxy (Nginx, Caddy, etc.)
• Include app-registry, CSP configuration, and all required config files
• Follow the exact same modular pattern as the existing Collabora integration

Details

This PR adds full Euro Office (based on EURO-office/DocumentServer) integration to opencloud-compose, modeled after the existing Collabora setup.

New files:

File	Purpose
weboffice/euroffice.yml	Service definitions: collaboration, euro-office, and OpenCloud env overrides
traefik/euroffice.yml	Traefik routing with network aliases and WebSocket middleware
external-proxy/euroffice.yml	Localhost port exposure (9300 for WOPI, 9900 for Document Server)
external-proxy/euroffice-exposed.yml	All-interfaces port exposure variant
config/euro-office/onlyoffice-docs-formats.json	Supported document format definitions
config/euro-office/app-registry.yaml	MIME type → app mappings (OOXML → Euro-Office, ODF → Collabora)

Modified files:

File	Change
config/opencloud/csp.yaml	Add Euro Office domain to frame-src and img-src
.env.example	Add Euro Office env vars and COMPOSE_FILE examples for all combinations

Supported deployment modes:

# Euro Office only (Traefik)
COMPOSE_FILE=docker-compose.yml:weboffice/euroffice.yml:traefik/opencloud.yml:traefik/euroffice.yml

# Euro Office only (external proxy)
COMPOSE_FILE=docker-compose.yml:weboffice/euroffice.yml:external-proxy/opencloud.yml:external-proxy/euroffice.yml

How this was built

This integration was vibe-coded using Claude Opus 4.6 (max effort) with the following repositories as input context to eliminate hallucination:

• euro-office-opencloud — existing Traefik-only integration (used as the primary reference)
• opencloud-compose — target repo, Collabora integration used as structural template
• opencloud — backend source, specifically the collaboration service and WOPI implementation
• EURO-office/DocumentServer — Euro Office source code for understanding config expectations

All config files, environment variables, service names, and port mappings were derived from reading the actual source code across these repos — not from guessing.

Test plan

• Tested with Nginx reverse proxy on a public server
• Tested Euro Office standalone (without Collabora) — works
• Verified CSP headers resolve correctly with custom domains (not .opencloud.test defaults)
• Verified WOPI discovery endpoint responds (/hosting/discovery)
• Verified document editing works (opening .docx in Euro Office)
• Test with Traefik (built-in reverse proxy)

[micbar]

@zerox80 Thanks for your contribution!

We need to wait until the official status of EuroOffice is clarified.

This branch should be kept as Work In Progress until then.

[streaminganger]

agreed with above. they dont have a proper release cycle yet

i think its also fair to mention the work to @tiran133 who was the first to get EuroOffice working in Opencloud and figure out the onlyoffice-docs-formats trick

[tiran133]

I'm happy for it to get merged.

https://nextcloud.com/blog/euro-office-license-compliance-and-what-open-source-means/

Something official.

But of course this does not mean its over I guess. A court still needs to decide IF OnlyOffice fight the license they put in. I guess time will tell

[zerox80]

Nextcloud is 100% correct here - no court ever will agree with onlyoffice.

[micbar]

We need to improve stuff here.

I think the use case to have two collaborative web applications is not what we want. This is horrible for end users.

@tbsbdr Once voted for not supporting it.

1. Therefore i would not introduce a second collaboration service here.
2. The entrypoint script with these many options looks overengineered. This should be as close as possible to how upstream starts the container to avoid maintenance hell.

[tiran133]

Since it was taken from my repository I can say a bit about the entry point.

The one from euro-office does not allow any customisation. You're not even able mount and override the config.json / local.json.

See https://github.com/Euro-Office/DocumentServer/blob/main/build/scripts/entrypoint.sh

So I took what was needed to get in working from the original entry point here
https://github.com/ONLYOFFICE/Docker-DocumentServer/blob/master/run-document-server.sh

That's why it is kinda big. Still smaller than the ONLYOFFICE one.

I understand the concern but unless the euro-office entry point gets more customisable friendly I'm afraid this is it for now.

[micbar]

Then it is maybe better to wrap the eurooffice https://github.com/Euro-Office/DocumentServer/blob/main/build/scripts/entrypoint.sh one.

If its just adding stuff.

[zerox80]

I threw out the massive override script and swapped it for a tiny wrapper that just generates the missing WOPI keys and then lets the official upstream entrypoint handle the rest