lwr.config.json

{
    "lwc": {
        "modules": [
            { "dir": "$rootDir/src/modules" },
            { "npm": "lightning-base-components" }
        ]
    },
    "assets": [
        {
            "alias": "assetsDir",
            "dir": "$rootDir/src/assets",
            "urlPath": "/assets"
        },
        {
            "dir": "$rootDir/src/assets/fonts",
            "urlPath": "/fonts"
        },
        {
            "file": "$rootDir/src/assets/images",
            "urlPath": "/lightning.utilitySprite"
        }
    ],
    "bundleConfig": {
        "exclude": [
            "lwc",
            "@lwc/synthetic-shadow",
            "lwr/navigation"
        ]
    },
    "routes": [
        {
            "id": "Home",
            "path": "/",
            "contentTemplate": "$contentDir/home.md",
            "layoutTemplate": "$layoutsDir/main_layout.njk",
            "bootstrap": {
                "syntheticShadow": true
            }
        },
        {
            "id": "About",
            "path": "/about",
            "contentTemplate": "$contentDir/about.md",
            "layoutTemplate": "$layoutsDir/main_layout.njk",
            "bootstrap": {
                "syntheticShadow": true
            }
        },
        {
            "id": "Fun",
            "path": "/fun",
            "contentTemplate": "$contentDir/fun.html",
            "layoutTemplate": "$layoutsDir/main_layout.njk",
            "bootstrap": {
                "syntheticShadow": true
            }
        },
        {
            "id": "Back",
            "path": "/back",
            "contentTemplate": "$contentDir/back.html",
            "layoutTemplate": "$layoutsDir/background_loop.njk"
        }
    ]
}