feat(docker): add registry images to compose services

Add gitea.leeworks.dev image references alongside build directives so
`docker compose up` pulls pre-built images while `--build` still builds
from local sources.

docker-compose.yml

@@ -18,6 +18,7 @@ services:
     restart: unless-stopped
 
   init-db:
+    image: gitea.leeworks.dev/0xwheatyz/sparc:latest
     build: .
     container_name: sparc-init-db
     command: python scripts/init_database.py
@@ -29,6 +30,7 @@ services:
     restart: "no"
 
   api:
+    image: gitea.leeworks.dev/0xwheatyz/sparc:latest
     build: .
     container_name: sparc-api
     command: uvicorn SPARC.api:app --host 0.0.0.0 --port 8000
@@ -76,6 +78,7 @@ services:
       - s3
 
   dashboard:
+    image: gitea.leeworks.dev/0xwheatyz/sparc:frontend-latest
     build: ./frontend
     container_name: sparc-dashboard
     ports: