Natifier.Json Setup & Templates. Just create your project folder, put these there and run npm install to install all the node mods, then run npm --name "APPTITLE" "https://www.office.com/?omkt=en-us" and your done

nativefier.json

{
    "name":"National Crisis Map",
    "targetUrl":"https://google.org/crisismap/usa?topics=met&gl=US&hl=en&llbox=",
    "counter":false,
    "bounce":false,
    "width":1280,
    "height":800,
    "showMenuBar":false,
    "fastQuit":false,
    "userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.181 Safari/537.36",
    "nativefierVersion":"7.6.12",
    "ignoreCertificate":false,
    "disableGpu":false,
    "ignoreGpuBlacklist":false,
    "enableEs3Apis":false,
    "insecure":false,
    "flashPluginDir":null,
    "diskCacheSize":null,
    "fullScreen":false,
    "maximize":false,
    "zoom":1,
    "internalUrls":null,
    "singleInstance":false,
    "clearCache":false,
        "win32metadata":{
            "ProductName":"National Crisis Map",
            "InternalName":"National Crisis Map",
            "FileDescription":"National Crisis Map"
            },
            "tray":false,
            "basicAuthUsername":null,
            "basicAuthPassword":null,
            "alwaysOnTop":false,
            "titleBarStyle":null,
            "globalShortcuts":null
        }

package.json

{
    "name":"national-crisis-map-nativefier-21c59c",
    "version":"1.0.0",
    "description":"Placeholder for the nativefier cli to override with a target url",
    "main":"lib/main.js",
    "dependencies":{
        "electron-context-menu":"^0.10.0",
        "electron-dl":"^1.10.0",
        "electron-squirrel-startup":"^1.0.0",
        "electron-window-state":"^4.1.1",
        "loglevel":"^1.5.1",
        "source-map-support":"^0.5.0",
        "wurl":"^2.5.2"},
        "devDependencies":{},
        "scripts":{
            "test":"echo \"Error: no test specified\" && exit 1"},
            "keywords":[
                "desktop",
                "electron"
                ],
                "author":"Jia Hao",
                "license":"MIT"
            }

Be sure to run npm install nativefier -g to install globally just once on whatever PC or laptop you are going to develop from.
You can get more information or how-to's from here if need be.