283601423f
Fixes https://github.com/badges/shields/issues/3260
Problem happens when a value of a color in an old PNG static badge is a number: http://localhost:8080/my-label/my-message.png?color=1. In this case `color` in `queryParams` is a number.
0a0b5b3f03/core/server/server.js (L203-L212)
Surprisingly service test listed below is passing currently on master - value `1` is represented in `queryParams` as a String (only in test).
`services/static-badge/static-badge.tester.js`
```js
t.create('Old static badge with a number as a color')
.get('/foo/bar.png?color=1', { followRedirect: false })
.expectStatus(301)
.expectHeader('Location', '/badge/foo-bar-1.png')
```
Moreover I added some code + description allowing to debug server.
