feat: Auto-initialize config files in Docker environment (PR #310)

- Add automatic config.json initialization on first run
- Improve Docker deployment experience
- Reduce manual configuration steps

Author: the-dev-z

docker-compose.yml

@@ -1,4 +1,19 @@
 services:
+  # Init service: ensure config.db file exists before backend starts
+  config-init:
+    image: busybox:1.36
+    command:
+      - sh
+      - -c
+      - >
+        touch /mnt/config.db &&
+        if [ ! -f /mnt/config.json ] && [ -f /mnt/config.json.example ]; then
+          cp /mnt/config.json.example /mnt/config.json;
+        fi
+    volumes:
+      - ./:/mnt
+    restart: "no"
+
   # Backend service (API and core logic)
   nofx:
     build:
@@ -18,6 +33,9 @@ services:
       - TZ=${NOFX_TIMEZONE:-Asia/Shanghai}  # Set timezone
     networks:
       - nofx-network
+    depends_on:
+      config-init:
+        condition: service_completed_successfully
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/api/health"]
       interval: 30s
@@ -47,4 +65,4 @@ services:
 
 networks:
   nofx-network:
-    driver: bridge
+    driver: bridge