Initial commit: Material Texture API service

- Go + Gin + GORM + PostgreSQL backend
- RESTful API for material management
- Docker deployment support
- Database partitioning for billion-scale data
- API documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,8 @@
+# 服务器配置
+SERVER_PORT=8080
+
+# 数据库配置
+DATABASE_URL=postgres://postgres:postgres@localhost:5432/material_db?sslmode=disable
+
+# API认证Token
+API_TOKEN=seatons3d