1 pound large shrimp, peeled, deveined
1 teaspoon salt, plus additional as needed
1 teaspoon dried crushed red pepper flakes
3 tablespoons olive oil, plus 1 to 2 tablespoons
1 medium onion, sliced
1 (14 1/2-ounce) can diced tomatoes
1 cup dry white wine
3 garlic cloves, chopped
1/4 teaspoon dried oregano leaves
3 tablespoon chopped fresh Italian parsley leaves
3 tablespoon chopped fresh basil leaves