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opkg update
opkg list-upgradable | cut -f 1 -d ' ' | xargs opkg upgrade 

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npm install ajv @types/ajv --save-dev

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## Step 1. Setup VSCode project build and debug configuration.

Under the `.vscode` folder create 'launch.json` and 'tasks.json` files. The contents of both files is shown below.

a. launch.json
```
{
    // Use IntelliSense to learn about possible Node.js debug attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387

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# Based on code sample at: http://www.marinamele.com/7-tips-to-time-python-scripts-and-control-memory-and-cpu-usage

# Decorator "fn_timer" which times a function and has argument "class-name".
def fn_timer(class_name):
    def _fn_timer(function):
        @wraps(function)
        def function_timer(*args, **kwargs):
            t0 = time.time()
            result = function(*args, **kwargs)
            t1 = time.time()