now.json

{
    "version": 2,
    "name": "ssr-react-wp",
    "builds": [
        { "src": "next.config.js", "use": "@now/next" }
    ],
    "build": {
        "env": {
          "API_BASE": "https://ssrwp-cms.kbhq.no"
        }
    },   
    "routes": [
        { "src": "/static/(.*)", "dest": "/static/($1)" },

        { "src": "/_next/static/(?:[^/]+/pages|chunks|runtime)/.+", "headers": { "cache-control": "immutable" } },

        {	
            "src": "^/service-worker.js$",	
            "dest": "/_next/static/service-worker.js",
            "headers": {
                "cache-control": "public, max-age=43200, immutable",
                "Service-Worker-Allowed": "/"
            }
        },
        { "src": "/robots.txt", "dest": "/static/robots.txt" },
        { "src": "/sitemap.xml", "dest": "/static/sitemap.xml" },
        
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/pl", 
            "dest": "/?lang=pl" 
        },
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/pl/posty/(?<slug>[^/]+)", 
            "dest": "/?lang=pl&type=post&slug=$slug" 
        },
        { 
            "headers": { "permalink": "true" },
            "methods": ["GET"], 
            "src": "/pl/(?<slug>[^/]+)", 
            "dest": "/?lang=pl&slug=$slug" 
        },
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/pl/(?<parent>[^/]+)/(?<slug>[^/]+)", 
            "dest": "/?lang=pl&parent=$parent&slug=$slug" 
        },
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/_preview/(?<type>[^/]+)/(?<id>[^/]+)/(?<nonce>[^/]+)/(?<image>[^/]+)", 
            "dest": "/?preview=true&type=$type&id=$id&nonce=$nonce&image=$image" 
        },
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/news/(?<slug>[^/]+)", 
            "dest": "/?slug=$slug&type=post" 
        },
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/(?<slug>[^/]+)", 
            "dest": "/?slug=$slug" 
        },
        { 
            "headers": { "permalink": "true" }, 
            "methods": ["GET"],
            "src": "/(?<parent>[^/]+)/(?<slug>[^/]+)", 
            "dest": "/?parent=$parent&slug=$slug" 
        }
    ]
}