feat(config): 添加环境配置文件并优化Docker Compose配置

添加了.env.example配置文件，包含PostgreSQL、Redis、MinIO/S3、
服务器和前端构建等完整的环境变量配置。

同时优化了docker-compose.yml文件中的环境变量引用方式，
移除了默认值设置，改为统一从环境变量中读取配置值，
提高了配置的灵活性和安全性

.env.example

@@ -0,0 +1,35 @@
+# PostgreSQL
+POSTGRES_USER=shiran
+POSTGRES_PASSWORD=change-me-postgres-password
+POSTGRES_DB=ciyuan_viewfinder
+POSTGRES_PGDATA=/var/lib/postgresql/data/pgdata
+
+# Redis
+REDIS_URL=redis://redis:6379/0
+
+# MinIO / S3
+MINIO_ROOT_USER=minioadmin
+MINIO_ROOT_PASSWORD=change-me-minio-password
+S3_ENDPOINT=http://minio:9000
+S3_ACCESS_KEY=minioadmin
+S3_SECRET_KEY=change-me-minio-password
+S3_BUCKET=ciyuan-viewfinder
+
+# Server
+DATABASE_URL=postgresql+asyncpg://shiran:change-me-postgres-password@postgres:5432/ciyuan_viewfinder
+DATABASE_URL_SYNC=postgresql://shiran:change-me-postgres-password@postgres:5432/ciyuan_viewfinder
+SECRET_KEY=change-me-before-production
+ACCESS_TOKEN_EXPIRE_MINUTES=43200
+REFRESH_TOKEN_EXPIRE_DAYS=60
+STORAGE_BACKEND=local
+LOCAL_STORAGE_PATH=/app/uploads
+TENCENT_MAP_KEY=
+LOG_LEVEL=INFO
+LOG_JSON=false
+
+# Frontend build
+VITE_API_BASE=/api/v1
+
+# Nginx host ports
+CLIENT_WEB_PORT=5173
+ADMIN_WEB_PORT=5174

docker-compose.yml

@@ -3,10 +3,10 @@ services:
     image: postgis/postgis:17-3.5
     container_name: ciyuan-postgres
     environment:
-      POSTGRES_USER: "${POSTGRES_USER:-shiran}"
-      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD:-change-me-postgres-password}"
-      POSTGRES_DB: "${POSTGRES_DB:-ciyuan_viewfinder}"
-      PGDATA: /var/lib/postgresql/data/pgdata
+      POSTGRES_USER: "${POSTGRES_USER}"
+      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD}"
+      POSTGRES_DB: "${POSTGRES_DB}"
+      PGDATA: "${POSTGRES_PGDATA}"
     expose:
       - "5432"
     volumes:
@@ -43,8 +43,8 @@ services:
     container_name: ciyuan-minio
     command: server /data --console-address ":9001"
     environment:
-      MINIO_ROOT_USER: "${MINIO_ROOT_USER:-minioadmin}"
-      MINIO_ROOT_PASSWORD: "${MINIO_ROOT_PASSWORD:-minioadmin}"
+      MINIO_ROOT_USER: "${MINIO_ROOT_USER}"
+      MINIO_ROOT_PASSWORD: "${MINIO_ROOT_PASSWORD}"
     expose:
       - "9000"
       - "9001"
@@ -59,21 +59,21 @@ services:
       context: ./server
     container_name: ciyuan-server
     environment:
-      DATABASE_URL: "postgresql+asyncpg://${POSTGRES_USER:-shiran}:${POSTGRES_PASSWORD:-change-me-postgres-password}@postgres:5432/${POSTGRES_DB:-ciyuan_viewfinder}"
-      DATABASE_URL_SYNC: "postgresql://${POSTGRES_USER:-shiran}:${POSTGRES_PASSWORD:-change-me-postgres-password}@postgres:5432/${POSTGRES_DB:-ciyuan_viewfinder}"
-      REDIS_URL: redis://redis:6379/0
-      SECRET_KEY: "${SECRET_KEY:-change-me-before-production}"
-      ACCESS_TOKEN_EXPIRE_MINUTES: "${ACCESS_TOKEN_EXPIRE_MINUTES:-43200}"
-      REFRESH_TOKEN_EXPIRE_DAYS: "${REFRESH_TOKEN_EXPIRE_DAYS:-60}"
-      STORAGE_BACKEND: local
-      LOCAL_STORAGE_PATH: /app/uploads
-      S3_ENDPOINT: http://minio:9000
-      S3_ACCESS_KEY: "${MINIO_ROOT_USER:-minioadmin}"
-      S3_SECRET_KEY: "${MINIO_ROOT_PASSWORD:-minioadmin}"
-      S3_BUCKET: "${S3_BUCKET:-ciyuan-viewfinder}"
-      TENCENT_MAP_KEY: "${TENCENT_MAP_KEY:-}"
-      LOG_LEVEL: "${LOG_LEVEL:-INFO}"
-      LOG_JSON: "${LOG_JSON:-false}"
+      DATABASE_URL: "${DATABASE_URL}"
+      DATABASE_URL_SYNC: "${DATABASE_URL_SYNC}"
+      REDIS_URL: "${REDIS_URL}"
+      SECRET_KEY: "${SECRET_KEY}"
+      ACCESS_TOKEN_EXPIRE_MINUTES: "${ACCESS_TOKEN_EXPIRE_MINUTES}"
+      REFRESH_TOKEN_EXPIRE_DAYS: "${REFRESH_TOKEN_EXPIRE_DAYS}"
+      STORAGE_BACKEND: "${STORAGE_BACKEND}"
+      LOCAL_STORAGE_PATH: "${LOCAL_STORAGE_PATH}"
+      S3_ENDPOINT: "${S3_ENDPOINT}"
+      S3_ACCESS_KEY: "${S3_ACCESS_KEY}"
+      S3_SECRET_KEY: "${S3_SECRET_KEY}"
+      S3_BUCKET: "${S3_BUCKET}"
+      TENCENT_MAP_KEY: "${TENCENT_MAP_KEY}"
+      LOG_LEVEL: "${LOG_LEVEL}"
+      LOG_JSON: "${LOG_JSON}"
     expose:
       - "8000"
     volumes:
@@ -105,7 +105,7 @@ services:
     build:
       context: ./admin-web
       args:
-        VITE_API_BASE: /api/v1
+        VITE_API_BASE: "${VITE_API_BASE}"
     container_name: ciyuan-admin-web
     expose:
       - "80"
@@ -133,8 +133,8 @@ services:
     image: nginx:1.27-alpine
     container_name: ciyuan-nginx
     ports:
-      - "${CLIENT_WEB_PORT:-5173}:80"
-      - "${ADMIN_WEB_PORT:-5174}:81"
+      - "${CLIENT_WEB_PORT}:80"
+      - "${ADMIN_WEB_PORT}:81"
     volumes:
       - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
     depends_on: