Move __version__ to a script

scripts/version.js

@@ -0,0 +1,20 @@
+const fs = require('fs');
+const path = require('path');
+const pkg = require('../package.json');
+
+let commit;
+
+try {
+  commit = require('git-rev-sync').short();
+} catch (err) {
+  // Whatever...
+}
+
+const filename = path.join(__dirname, '..', 'public', 'version.json');
+const filedata = {
+  commit,
+  source: pkg.homepage,
+  version: pkg.version
+};
+
+fs.writeFileSync(filename, JSON.stringify(filedata, null, 2) + '\n');