Flesh out the FAQ content

documentation/faq/200-hmr.md

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+---
+question: How do I use HMR with SvelteKit?
+---
+
+SvelteKit has HMR enabled by default powered by [svelte-hmr](https://github.com/rixo/svelte-hmr). If you saw, [Rich's presentation at the 2020 Svelte Summit](https://svelte.dev/blog/whats-the-deal-with-sveltekit) you may have seen a more powerful-looking version of HMR presented. This demo had `svelte-hmr`'s `preserveLocalState` flag on. This flag is now off by default because it may lead to unexpected behavior and edge cases. But don't worry, you are still getting HMR with SvelteKit!

documentation/faq/300-fallthrough.md

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+---
+question: Why am I getting a 404?
+---
+
+Please make sure you're returning something from your page's `load` function. See the section about [fallthrough routes](../docs#routing-advanced-fallthrough-routes) for more details.

documentation/faq/400-adapters.md

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+---
+question: I'm having trouble using an adapter.
+---
+
+Please make sure the version of the adapter specified in your `package.json` is `"next"`.

documentation/faq/500-aliases.md

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+---
+question: How do I setup a path alias?
+---
+
+Please be aware that you will probably want the alias specified in two places:
+* In `svelte.config.cjs` add [`vite.resolve.alias`](https://vitejs.dev/config/#resolve-alias)
+* In `tsconfig.json` (for TypeScript users) or `jsconfig.json` (for JavaScript users) to make VS Code aware of the alias

documentation/faq/600-packages.md

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+---
+question: How do I fix the error I'm getting trying to include a package?
+---
+
+Most of these issues come from Vite. You may find helpful examples in [the Vite issue tracker](https://github.com/vitejs/vite/issues). The most common solutions would be to try moving the package between `dependencies` and `devDependencies` or trying to `include` or `exclude` it in `optimizeDeps`. Packages which use `exports` instead of `module.exports` are currently failing due to a [known Vite issue](https://github.com/vitejs/vite/issues/2579).

documentation/faq/700-integrations.md

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+---
+question: How do I use X with SvelteKit?
+---
+
+## How do I setup library X?
+
+Please see [sveltejs/integrations](https://github.com/sveltejs/integrations#sveltekit) for examples of using many popular libraries like Tailwind, PostCSS, Firebase, GraphQL, mdsvex, and more.
+
+## How do I setup a database?
+
+Put the code to query your database in [endpoints](../docs#routing-endpoints) - don't query the database in .svelte files. You can create a `db.js` or similar that sets up a connection immediately and makes the client accessible throughout the app as a singleton. You can execute any one-time setup code in `hooks.js` and import your database helpers into any endpoint that needs them.
+
+## How do I use Axios?
+
+You probably don't need it. We'd generally recommend you just use `fetch` instead. If you insist, you're probably better off using an ESM-friendly alternative like `redaxios`. Finally, if you still want to use Axios itself, try putting it in `optimizeDeps.include`.