Improve PWA capabilities

rollup.config.js

@@ -1,40 +0,0 @@
-import svelte from 'rollup-plugin-svelte';
-import resolve from '@rollup/plugin-node-resolve';
-import commonjs from '@rollup/plugin-commonjs';
-import { terser } from 'rollup-plugin-terser';
-
-const production = !process.env.ROLLUP_WATCH;
-
-export default {
-	input: 'bookmarks/frontend/index.js',
-	output: {
-		sourcemap: true,
-		format: 'iife',
-		name: 'linkding',
-		// Generate bundle in static folder to that it is picked up by Django static files finder
-		file: 'bookmarks/static/bundle.js'
-	},
-	plugins: [
-		svelte({
-			emitCss: false
-		}),
-
-		// If you have external dependencies installed from
-		// npm, you'll most likely need these plugins. In
-		// some cases you'll need additional configuration —
-		// consult the documentation for details:
-		// https://github.com/rollup/rollup-plugin-commonjs
-		resolve({
-			browser: true,
-			dedupe: importee => importee === 'svelte' || importee.startsWith('svelte/')
-		}),
-		commonjs(),
-
-		// If we're building for production (npm run build
-		// instead of npm run dev), minify
-		production && terser()
-	],
-	watch: {
-		clearScreen: false
-	}
-};