mongodb dependency

[colinbes]

When trying to run development server using npm run serve where serve is defined as vue-cli-service serve in package file I get dependency error message:

ERROR  Failed to compile with 1 errors
This dependency was not found:
* mongodb in ./node_modules/tingodb/lib/main.js
To install it, you can run: npm install --save mongodb

Looking at npm web page it does list MongoDB as development dependency but I wouldn't expect this to effect me. I did try adding MongoDB as devDependency but then it came up with whole bunch of other missing dependencies.

I haven't seen this in past when using Tingo.

Any ideas?