Add profile backgroundImage api

src/server.js

@@ -151,6 +151,8 @@ function initializeExpressSync() {
     router.post('/api/v1/profile',                                 json, token, routes.profile.authorize, routes.profile.update);
     router.get ('/api/v1/profile/avatar/:identifier',                           routes.profile.getAvatar); // this is not scoped so it can used directly in img tag
     router.post('/api/v1/profile/avatar',                          json, token, (req, res, next) => { return typeof req.body.avatar === 'string' ? next() : multipart(req, res, next); }, routes.profile.setAvatar); // avatar is not exposed in LDAP. so it's personal and not locked
+    router.get ('/api/v1/profile/backgroundImage',                       token, routes.profile.getBackgroundImage);
+    router.post('/api/v1/profile/backgroundImage',                       token, multipart, routes.profile.setBackgroundImage); // backgroundImage is not exposed in LDAP. so it's personal and not locked
     router.post('/api/v1/profile/password',                        json, token, routes.users.verifyPassword, routes.profile.setPassword);
     router.post('/api/v1/profile/twofactorauthentication_secret',  json, token, routes.profile.setTwoFactorAuthenticationSecret);
     router.post('/api/v1/profile/twofactorauthentication_enable',  json, token, routes.profile.enableTwoFactorAuthentication);