Add initial project configuration and setup for Reference Board Viewer application. Include EditorConfig for consistent coding styles, pre-commit hooks for linting and formatting, Docker Compose for local development with PostgreSQL and MinIO, and a Nix flake for development environment management. Establish CI/CD pipeline for automated testing and deployment.

backend/app/core/config.py

@@ -0,0 +1,93 @@
+"""Application configuration."""
+
+from functools import lru_cache
+from typing import Any
+
+from pydantic import PostgresDsn, field_validator
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Application settings."""
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        case_sensitive=False,
+        extra="ignore",
+    )
+
+    # Application
+    APP_NAME: str = "Reference Board Viewer"
+    APP_VERSION: str = "1.0.0"
+    DEBUG: bool = False
+    API_V1_PREFIX: str = "/api/v1"
+
+    # Database
+    DATABASE_URL: PostgresDsn
+    DATABASE_POOL_SIZE: int = 20
+    DATABASE_MAX_OVERFLOW: int = 0
+
+    # JWT Authentication
+    SECRET_KEY: str
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+
+    # MinIO Storage
+    MINIO_ENDPOINT: str
+    MINIO_ACCESS_KEY: str
+    MINIO_SECRET_KEY: str
+    MINIO_BUCKET: str = "webref"
+    MINIO_SECURE: bool = False
+
+    # CORS
+    CORS_ORIGINS: list[str] = ["http://localhost:5173", "http://localhost:3000"]
+
+    @field_validator("CORS_ORIGINS", mode="before")
+    @classmethod
+    def parse_cors_origins(cls, v: Any) -> list[str]:
+        """Parse CORS origins from string or list."""
+        if isinstance(v, str):
+            return [origin.strip() for origin in v.split(",")]
+        return v
+
+    # File Upload
+    MAX_FILE_SIZE: int = 52428800  # 50MB
+    MAX_BATCH_SIZE: int = 524288000  # 500MB
+    ALLOWED_MIME_TYPES: list[str] = [
+        "image/jpeg",
+        "image/png",
+        "image/gif",
+        "image/webp",
+        "image/svg+xml",
+    ]
+
+    @field_validator("ALLOWED_MIME_TYPES", mode="before")
+    @classmethod
+    def parse_mime_types(cls, v: Any) -> list[str]:
+        """Parse MIME types from string or list."""
+        if isinstance(v, str):
+            return [mime.strip() for mime in v.split(",")]
+        return v
+
+    # Performance
+    REQUEST_TIMEOUT: int = 30
+    MAX_CONCURRENT_UPLOADS: int = 10
+
+    # Security
+    BCRYPT_ROUNDS: int = 12
+    PASSWORD_MIN_LENGTH: int = 8
+
+    # Logging
+    LOG_LEVEL: str = "INFO"
+
+
+@lru_cache
+def get_settings() -> Settings:
+    """Get cached application settings."""
+    return Settings()
+
+
+# Export settings instance
+settings = get_settings()
+