Minor UI and doc fixes (#57)

* docs: update the yarn dev command

The doc currently says `yarn start` but there is no `start` command.
It is supposed to be `yarn serve`

* fix(ui): box border strikes through the `Message` text

Author: afeedhshaji

README.md

@@ -34,7 +34,7 @@ Clone the repo and do :
 
 ```
 yarn install
-yarn start
+yarn serve
 ```
 
 WebTorrent trackers list is included in `src/main.ts`. You may want to change that or add/start your [own tracker](https://github.com/subins2000/p2pt/blob/master/startTracker.js) locally for development.

src/components/Shares.vue

@@ -888,4 +888,5 @@ body.dragging:after
     padding-left: 0.125em
     padding-right: 0.125em
     font-size: calc(1rem * 3 / 4)
+    background-color: rgb(255, 255, 255)
 </style>