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-eo, euro-office, and OpenCloud env overrides
traefik/euroffice.yml	Traefik routing with network aliases and WebSocket middleware
external-proxy/euroffice.yml	Localhost port exposure (9302 for WOPI, 9900 for Document Server)
external-proxy/euroffice-exposed.yml	All-interfaces port exposure variant
config/euro-office/entrypoint-override.sh	Startup script handling WOPI key generation, JWT config, and service init
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

# Both Collabora + Euro Office (Traefik)
COMPOSE_FILE=docker-compose.yml:weboffice/collabora.yml:weboffice/euroffice.yml:traefik/opencloud.yml:traefik/collabora.yml:traefik/euroffice.yml

# Both Collabora + Euro Office (external proxy)
COMPOSE_FILE=docker-compose.yml:weboffice/collabora.yml:weboffice/euroffice.yml:external-proxy/opencloud.yml:external-proxy/collabora.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)
• Test both Collabora + Euro Office simultaneously

[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