Rename docker-compose.yaml to compose.yaml and pull prebuilt images

Use the images published by the new Gitea Actions workflow instead
of building locally, so deploys just pull the latest tag.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -32,7 +32,7 @@ Frontend translations live in `frontend/src/i18n/locales/<lang>/<namespace>.json
 
 ```
 whowhat/
-├── docker-compose.yaml       # the only file needed to run everything
+├── compose.yaml               # the only file needed to run everything
 ├── .env                      # configuration (secrets, domain, SMTP) — do NOT commit
 ├── .env.example              # configuration template to copy
 ├── sqlite/                   # bind mount — app.db lives here (data persistence)
@@ -66,15 +66,16 @@ Docker (with the Compose plugin) is the only requirement.
 
 ```bash
 cp .env.example .env
-# fill in .env (see below) — no need to edit docker-compose.yaml
-sudo docker compose up -d --build
+# fill in .env (see below) — no need to edit compose.yaml
+sudo docker compose pull
+sudo docker compose up -d
 ```
 
 The app will be available at `http://localhost:8856` (and at your Traefik domain, if configured — see below).
 
 ## Configuration (`.env`)
 
-All deployment configuration lives in `.env` — `docker-compose.yaml` doesn't need editing.
+All deployment configuration lives in `.env` — `compose.yaml` doesn't need editing.
 
 | Variable | Description | Default |
 |---|---|---|

compose.yaml

@@ -1,6 +1,6 @@
 services:
   backend:
-    build: ./backend
+    image: gitea.kzbikowski.pl/kzbkowski/whowhat/backend:latest
     environment:
       JWT_SECRET: ${JWT_SECRET:-please-change-this-secret-in-.env}
       DATABASE_PATH: /app/data/app.db
@@ -19,7 +19,7 @@ services:
     restart: unless-stopped
 
   frontend:
-    build: ./frontend
+    image: gitea.kzbikowski.pl/kzbkowski/whowhat/frontend:latest
     ports:
       - "8856:80"
     depends_on: