build: docker-compose service → roundtable

Service, container_name, image, and env var name flipped to roundtable.
DB credentials kept as fabledscryer to preserve the existing pgdata
volume — a separate migration can rename the role/db later if desired.

docker-compose.yml

@@ -1,6 +1,8 @@
 services:
-  app:
+  roundtable:
     build: .
+    container_name: roundtable
+    image: roundtable:latest
     ports:
       - "5000:5000"
     volumes:
@@ -9,7 +11,7 @@ services:
       - /mnt/Data/traefik/log:/var/log/traefik:ro
       - /var/run/docker.sock:/var/run/docker.sock:ro
     environment:
-      - FABLEDSCRYER_DATABASE_URL=postgresql+asyncpg://fabledscryer:fabledscryer@db/fabledscryer
+      - ROUNDTABLE_DATABASE_URL=postgresql+asyncpg://fabledscryer:fabledscryer@db/fabledscryer
     depends_on:
       db:
         condition: service_healthy