Need Cloud Functions for Firebase folder permissions when using Codeanywhere

Question

Trying to get started using Firebase functions and have hit a a problem where I can't edit the file that contains the functions code: /functions/index.js

My environment is a Codeanywhere container. I am running these versions of node and NPM:

cabox@box-codeanywhere:~$ node -v
v10.10.0
cabox@box-codeanywhere:~$ npm -v
6.4.1

I took followed these steps after updating NPM:

1. sudo npm install -g firebase-tools
2. sudo firebase login --no-localhost
3. (logged in with my G-Suite account associated with Firebase instance)
4. sudo firebase init

I have followed these answer from this question to ensure my Google account has the correct permissions: Permission denied in firebase cloud functions. And still no joy.

Unsure whether this is a Codeanywhere peculiarity or common Firebase issue.