API Proxy Key - modified for approov

modified config.js

module.exports = {
    proxy_port:             /* port the proxy listens on */
        8080,
    nasa_host:              /* NASA API host */
        'api.nasa.gov',
    nasa_protocol:          /* NASA API protocol */
        'https:',
    approov_header:         /* Approov header name */
        'approov',
    approov_enforcement:    /* set true to enforce token checks */
        true,
};