Front door: carry the site entity as JSON-LD (#116)

ddiff --git a/server/render/layout.js b/server/render/layout.js
iindex 8542793..fe460fe 100644
---- a/server/render/layout.js
++++ b/server/render/layout.js
@@@ -10,6 +10,7 @@ const fs = require('fs');
  const path = require('path');
  const appIcon = require('openvibe-shared/app-icon');
  const shell = require('openvibe-shared/shell');
++const seo = require('openvibe-shared/seo');
  const rooms = require('openvibe-shared/rooms');
  const ovServe = require('openvibe-shared/serve');
  const cache = require('openvibe-shared/cache-policy');
@@@ -77,7 +78,7 @@ function layout(o) {
          description: o.description || `${SITE_NAME}: ${TAGLINE} Share one port on your computer at its own address, behind OpenVibe sign-in.`,
          canonical,
          robots: o.robots || (o.index ? 'index, follow' : 'noindex, follow'),
--        jsonLd: (o.jsonLd || []).filter(Boolean),
++        jsonLd: (o.jsonLd || [seo.jsonLd.website({ name: SITE_NAME, url: `${config.baseUrl}/`, description: `${SITE_NAME}: ${TAGLINE}` })]).filter(Boolean),
          home: '/',
          navLinks: NAV,
          navbar,
ddiff --git a/test/pages.test.js b/test/pages.test.js
iindex 73db190..7ad31ff 100644
---- a/test/pages.test.js
++++ b/test/pages.test.js
@@@ -21,6 +21,8 @@ const { check, done } = require('./helpers/check');
          assert.match(r.text, /Sign in to make a share/);
          assert.ok(!r.text.includes('action="/shares"'));
          assert.match(r.text, /<meta name="robots" content="index, follow"/);
++        assert.match(r.text, /<script type="application\/ld\+json">[^<]*"@type":"WebSite"/, 'the front door carries the site entity');
++        assert.match(r.text, /"name":"OpenVibe Connect"/);
      });
  
      await check('signed in: your shares and the form, with your own address in it', async () => {