remove more cross-fetch usage in backends

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

packages/backend-common/package.json

@@ -46,7 +46,6 @@
     "compression": "^1.7.4",
     "concat-stream": "^2.0.0",
     "cors": "^2.8.5",
-    "cross-fetch": "^3.0.6",
     "dockerode": "^3.3.1",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
@@ -64,6 +63,7 @@
     "minimist": "^1.2.5",
     "morgan": "^1.10.0",
     "node-abort-controller": "^3.0.1",
+    "node-fetch": "^2.6.1",
     "raw-body": "^2.4.1",
     "selfsigned": "^1.10.7",
     "stoppable": "^1.1.0",