diff --git a/app/core/config.py b/app/core/config.py
new file mode 100644
index 0000000..7509702
--- /dev/null
+++ b/app/core/config.py
@@ -0,0 +1,49 @@
+"""
+Configuration settings for the application.
+"""
+from pathlib import Path
+from typing import List, Optional, Union
+
+from pydantic import AnyHttpUrl, BaseSettings, validator
+
+
+class Settings(BaseSettings):
+    """
+    Application settings.
+    """
+
+    PROJECT_NAME: str = "Todo API"
+    VERSION: str = "0.1.0"
+    API_V1_STR: str = "/api/v1"
+    
+    # BACKEND_CORS_ORIGINS is a comma-separated list of origins
+    # e.g: "http://localhost:8000,http://localhost:3000"
+    BACKEND_CORS_ORIGINS: List[AnyHttpUrl] = []
+
+    @validator("BACKEND_CORS_ORIGINS", pre=True)
+    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> List[str]:
+        """
+        Parse CORS origins from string or list.
+        """
+        if isinstance(v, str) and not v.startswith("["):
+            return [i.strip() for i in v.split(",")]
+        if isinstance(v, (list, str)):
+            return v
+        raise ValueError(v)
+
+    # Database configuration
+    DB_DIR: Path = Path("/app") / "storage" / "db"
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+
+    class Config:
+        """
+        Config class for Settings.
+        """
+        case_sensitive = True
+
+
+# Create settings instance
+settings = Settings()
+
+# Ensure DB directory exists
+settings.DB_DIR.mkdir(parents=True, exist_ok=True)
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diff --git a/main.py b/main.py
new file mode 100644
index 0000000..62a4809
--- /dev/null
+++ b/main.py
@@ -0,0 +1,39 @@
+"""
+Todo API main application.
+"""
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.api.v1.api import api_router
+from app.core.config import settings
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    openapi_url="/openapi.json",
+    version=settings.VERSION,
+)
+
+# Set all CORS enabled origins
+if settings.BACKEND_CORS_ORIGINS:
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+app.include_router(api_router, prefix="/api/v1")
+
+
+@app.get("/health", tags=["health"])
+async def health_check():
+    """
+    Health check endpoint.
+    """
+    return {"status": "ok", "message": "Todo API is running"}
+
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)
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