button disabled css 추가

client/src/components/Buttons/BtnGroup.js

 import { useHistory } from "react-router-dom";
+import styles from "./buttons.module.scss";
 
 const BtnGroup = () => {
     const history = useHistory();
@@ -6,7 +7,7 @@ const BtnGroup = () => {
     return (
         <div className="d-flex justify-content-around my-4">
             <button className="btn btn-white col-5 shadow-none border-dark" type="button" onClick={() => history.goBack()}>취소</button>
-            <button className="btn btn-crimson col-5" type="submit">등록</button>
+            <button className={`btn btn-crimson col-5 ${styles.disabledBtn}`} type="submit" disabled>등록</button>
         </div>
     )
 }

client/src/components/Buttons/buttons.module.scss

@@ -36,4 +36,9 @@
             color: crimson;
         }
     }
+}
+
+.disabledBtn:disabled {
+    background-color: #6c757d;
+    border-color: #6c757d;
 }
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