feat: Add environment configuration files and update settings for production and development

app/services/oauth.py

@@ -70,7 +70,7 @@ class OAuthProvider(ABC):
         """Generate authorization URL with state parameter."""
         # Construct provider-specific redirect URI
         redirect_uri = (
-            f"http://localhost:8000/api/v1/auth/{self.provider_name}/callback"
+            f"{settings.BACKEND_URL}/api/v1/auth/{self.provider_name}/callback"
         )
 
         params = {
@@ -86,7 +86,7 @@ class OAuthProvider(ABC):
         """Exchange authorization code for access token."""
         # Construct provider-specific redirect URI (must match authorization request)
         redirect_uri = (
-            f"http://localhost:8000/api/v1/auth/{self.provider_name}/callback"
+            f"{settings.BACKEND_URL}/api/v1/auth/{self.provider_name}/callback"
         )
 
         data = {
@@ -150,7 +150,7 @@ class GoogleOAuthProvider(OAuthProvider):
         """Exchange authorization code for access token."""
         # Construct provider-specific redirect URI (must match authorization request)
         redirect_uri = (
-            f"http://localhost:8000/api/v1/auth/{self.provider_name}/callback"
+            f"{settings.BACKEND_URL}/api/v1/auth/{self.provider_name}/callback"
         )
 
         data = {