feature(database-connection): Refactor ErrorContainer.tsx to functional components

frontend/src/components/ErrorContainer/ErrorContainer.tsx

@@ -1,19 +1,14 @@
 import React from 'react';
 import './ErrorContainer.scss';
 
-export interface ErrorContainerProperties {
-  message: string
-}
+const ErrorContainer: React.FC<IErrorContainerProps> = (props: IErrorContainerProps) => (
+    <div className="ErrorContainer" data-testid="ErrorContainer">
+        {props.message}
+    </div>
+)
 
-class ErrorContainer extends React.Component<ErrorContainerProperties> {
-
-  render() {
-    return (
-      <div className="ErrorContainer" data-testid="ErrorContainer">
-        { this.props.message }
-      </div>
-    )
-  }
+export interface IErrorContainerProps {
+    message: string
 }
 
 export default ErrorContainer;