bump version and add "-beta"

package.json

@@ -1,6 +1,6 @@
 {
   "name": "Images for Trade",
-  "version": "1.2.2",
+  "version": "1.2.3-beta",
   "description": "",
   "license": "UNLICENSED",
   "dependencies": {

src/server.ts

@@ -49,7 +49,7 @@ const uploadDir = 'uploads';
 const uploadMulter = multer({ dest: uploadDir + '/' });
 
 app.get('/ping', async (req, res) => {
-  res.send('pong - v 1.2.2'); // version
+  res.send('pong - v 1.2.3-beta'); // version
 });
 
 app.get('/image-limits', async (req, res) => {