You should only set these variables if your server is behind a trusted reverse proxy otherwise, it'd be possible for clients to spoof these headers. X-forwarded-proto and x-forwarded-host are de facto standard headers that forward the original protocol and host if you're using a reverse proxy (think load balancers and CDNs). Alternatively, you can specify headers that tell SvelteKit about the request protocol and host, from which it can construct the origin URL: PROTOCOL_HEADER=x-forwarded-proto HOST_HEADER=x-forwarded-host node build With this, a request for the /stuff pathname will correctly resolve to. for local previewing and testing ORIGIN= node build The simplest way to tell SvelteKit where the app is being served is to set the ORIGIN environment variable: ORIGIN= node build # or e.g. HTTP doesn't give SvelteKit a reliable way to know the URL that is currently being requested. SOCKET_PATH=/tmp/socket node build ORIGIN, PROTOCOL_HEADER and HOST_HEADER When this is done using the SOCKET_PATH environment variable, the HOST and PORT environment variables will be disregarded. These can be customised with the PORT and HOST environment variables: HOST=127.0.0.1 PORT=4000 node buildĪlternatively, the server can be configured to accept connections on a specified socket path. and invoke it before running the built app: node buildīy default, the server will accept connections on 0.0.0.0 using port 3000. To do so, install dotenv in your project. In dev and preview, SvelteKit will read environment variables from your. To control whether a given package is bundled or externalised, place it in devDependencies or dependencies respectively in your package.json. You can then start your app with this command: node buildĭevelopment dependencies will be bundled into your app using Rollup. Production dependencies can be generated by copying the package.json and package-lock.json and then running npm ci -omit dev (you can skip this step if your app doesn't have any dependencies). You will need the output directory, the project's package.json, and the production dependencies in node_modules to run the application. This will create the production server in the output directory specified in the adapter options, defaulting to build. First, build your app with npm run build.
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