ui redesign, markdown fix + metadata and auth header

docker-compose.yml

@@ -1,19 +1,34 @@
 services:
   backend:
-    build: 
+    build:
       context: ./backend
       dockerfile: Dockerfile
-    ports:
-      - "3000:3000"
+    expose:
+      - "3000"
     volumes:
       - ./data:/app/data
     environment:
       - PORT=3000
-      - ADMIN_TOKEN=${ADMIN_TOKEN:-default_insecure_token}
+      # No fallback — fail fast if ADMIN_TOKEN isn't set in your .env.
+      - ADMIN_TOKEN=${ADMIN_TOKEN:?ADMIN_TOKEN must be set in .env}
       - DATA_DIR=/app/data
+      - COOKIE_SECURE=${COOKIE_SECURE:-true}
+      - FRONTEND_ORIGIN=${FRONTEND_ORIGIN:-}
+      - RUST_LOG=${RUST_LOG:-info}
     restart: unless-stopped
     networks:
       - internal_net
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://localhost:3000/healthz"]
+      interval: 15s
+      timeout: 3s
+      retries: 5
+      start_period: 10s
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
 
   frontend:
     build:
@@ -24,10 +39,16 @@ services:
     environment:
       - PUBLIC_API_URL=http://backend:3000
     depends_on:
-      - backend
+      backend:
+        condition: service_healthy
     restart: unless-stopped
     networks:
       - internal_net
+    logging:
+      driver: json-file
+      options:
+        max-size: "10m"
+        max-file: "3"
 
 networks:
   internal_net: