fix: Isssue #1091 footer The footer should stay at the bottom of the screen

packages/my-joy-beta/src/components/navigation/footer.js

@@ -9,7 +9,7 @@ const List = styled.ul`
   border-top: ${remcalc(1)} solid ${props => props.theme.grey};
   width: 100%;
   justify-content: flex-end;
-  position: absolute;
+  position: fixed;
   box-sizing: border-box;
   margin: 0;
   bottom: 0;