Add tela (markdown-native team wiki) one-click app

[zcag]

New app: tela

Adds tela as a one-click app under Apps/tela/.

tela is a self-hostable, markdown-native team wiki. Page bodies stay canonical Markdown (no proprietary block store). It has a Go + PostgreSQL backend, a React editor with live Yjs collaboration, full-text + optional semantic search, WebDAV folder sync, public/blog spaces, Slidev decks, PDF export, and a built-in MCP server so AI agents can read/write pages.

• Website: https://telawiki.com
• Source (AGPL-3.0): https://github.com/zcag/tela
• Category: Productivity

What changed

• Apps/tela/docker-compose.yml with a top-level x-casaos block + per-service blocks
• Apps/tela/icon.png (512x512) and two screenshots

Architecture / images

Pinned to v0.7.0. All images are multi-arch (amd64 + arm64):

• ghcr.io/zcag/tela-proxy:0.7.0 — Caddy, the only web-exposed service (main), 8780:80
• ghcr.io/zcag/tela-backend:0.7.0 — Go API (internal :8080)
• ghcr.io/zcag/tela-frontend:0.7.0 — nginx SPA (internal :80)
• pgvector/pgvector:pg17 — PostgreSQL (pgvector required for semantic search)
• ghcr.io/zcag/tela-deck:0.7.0 — Slidev deck renderer
• gotenberg/gotenberg:8 — PDF rendering

Secrets are pre-generated inline (per repo convention) so it installs out of the box. Data persists under /DATA/AppData/$AppID/. After install, open the WebUI and complete the first-boot /setup wizard to create the admin account.

Test evidence

• name field matches ^[a-z0-9_-]+$
• docker compose -f Apps/tela/docker-compose.yml config -q passes
• python3 scripts/build_appstore.py builds successfully (1 app; dist/apps/tela/{docker-compose.yml,meta.json} + webp assets generated)
• Stack verified working via docker compose: proxy serves the SPA and routes /api to the backend; backend migrates and boots against the pgvector Postgres

[sonarqubecloud]

Quality Gate failed

Failed conditions
E Security Rating on New Code (required ≥ A)

See analysis details on SonarQube Cloud

Catch issues before they fail your Quality Gate with our IDE extension SonarQube for IDE

[zcag]

Note on the failing validate check: it is not caused by this PR.

The "Validate all docker-compose files" step lints every app under Apps/, and it fails on a pre-existing file on main:

Apps/Etherpad/docker-compose.yml
line 99: mapping key "ports" already defined at line 38

Apps/Etherpad/docker-compose.yml has a duplicate ports: key inside its x-casaos block, which current docker compose config -q rejects. This reproduces on upstream/main with no changes from this PR, so the same check fails on any PR opened right now.

tela's own file validates cleanly:

• name: matches ^[a-z0-9_-]+$
• docker compose -f Apps/tela/docker-compose.yml config -q passes
• python3 scripts/build_appstore.py builds the app successfully (meta.json + webp assets generated)

Happy to rebase once Etherpad is fixed on main. I kept this PR scoped to tela only; let me know if you'd prefer I include the one-line Etherpad fix here.