lighthouse-break-jenkins-build-by-metrics.js

var fs = require('fs');
var sites = [];

var threshold = {
    "performance": 0.90,
    "accessibility": 0.95,
    "seo": 0.90,
    "pwa": 0
};

fs.readdir(".", (err, files) => {
    files.forEach(file => {
        if (file.endsWith(".report.json")) {
            var obj = JSON.parse(fs.readFileSync(file, 'utf8'));

            var isAcceptable = (obj.categories.performance.score >= threshold.performance &&
                obj.categories.accessibility.score >= threshold.accessibility &&
                obj.categories.seo.score >= threshold.seo &&
                obj.categories.pwa.score >= threshold.pwa );

            sites.push({
                "site": obj.requestedUrl,
                "performanceScore": obj.categories.performance.score,
                "accessibilityScore": obj.categories.accessibility.score,
                "seoScore": obj.categories.seo.score,
                "pwaScore": obj.categories.pwa.score,
                "acceptable" : isAcceptable
            });
        }
    });
    
    console.log(sites);

    sites.forEach(element => {
         if(element.acceptable === false){
            process.exit(-1);
         }
    });
});

The idea is to use it on Jenkins so we can break the build.
It will read all the .report.json files on the current folder and if there isn't a acceptable value it will return -1.