Merge pull request #1591 from spotify/rugvip/node-12

package: enforce node 12

package.json

@@ -2,7 +2,7 @@
   "name": "root",
   "private": true,
   "engines": {
-    "node": ">=12.0.0"
+    "node": "12"
   },
   "scripts": {
     "start": "yarn workspace example-app start",

packages/backend/package.json

@@ -6,7 +6,7 @@
   "private": true,
   "license": "Apache-2.0",
   "engines": {
-    "node": ">=12"
+    "node": "12"
   },
   "scripts": {
     "build": "backstage-cli backend:build",

packages/cli/templates/default-app/package.json.hbs

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "private": true,
   "engines": {
-    "node": ">=12.0.0"
+    "node": "12"
   },
   "scripts": {
     "start": "yarn workspace app start",