Define Node.js 12 as requirement

.nvmrc

+12
\ No newline at end of file

README.md

@@ -58,6 +58,8 @@ If you want to hack on this project, here is how you do it.
 
 #### Installing dependencies
 
+Install Node.js 12 first (or if you use [nvm](https://github.com/nvm-sh/nvm), switch to Node.js 12 by running `nvm use`).
+
 ```bash
 npm install
 ```

package.json

@@ -15,6 +15,9 @@
     "validate": "npm ls",
     "watch": "webpack --config ./webpack.renderer.js --mode development --watch --watch-poll"
   },
+  "engines" : {
+    "node" : ">=12.0.0"
+  },
   "build": {
     "appId": "org.jitsi.jitsi-meet",
     "productName": "Jitsi Meet",