Fix card image margin when there is no image

src/components/Card/Card.tsx

@@ -24,10 +24,12 @@ class Card extends React.Component<CardProps, CardState> {
       minute: "2-digit"
     };
     const datetime = new Date(this.props.start_time).toLocaleString("fi-FI", options);
+
+    const imageElem = !!image ? <img src={image} className="card__image" /> : null;
     if (link) {
       return (
         <Link to={link} className="card">
-          <img src={image} className="card__image" />
+          {imageElem}
           <div className="card__datetime">{datetime}</div>
           <div className="card__title">{title}</div>
           <div className="card__text">{text}</div>
@@ -37,7 +39,7 @@ class Card extends React.Component<CardProps, CardState> {
     } else {
       return (
         <div className="card">
-          <img src={image} className="card__image" />
+          {imageElem}
           <div className="card__datetime">{datetime}</div>
           <div className="card__title">{title}</div>
           <div className="card__text">{text}</div>