diff --git a/.env.local.example b/.env.local.example
index 1abd202a5..9c7389158 100644
--- a/.env.local.example
+++ b/.env.local.example
@@ -1,8 +1,13 @@
-# Duplicate this file and remove the '.example' suffix.
-# Adjust the values as needed.
+# (1) Duplicate this file and remove the '.example' suffix.
+# Naming this file '.env.local' is a Vite convention to prevent accidentally
+# submitting to git.
+# For more info see: https://vitejs.dev/guide/env-and-mode.html#env-files
 
-VITE_IS_ONLINE=true
-VITE_WORKBOX_DEBUG=false
-SENTRY_AUTH_TOKEN=YOUR_TOKEN
-SENTRY_ORG=vikunja
-SENTRY_PROJECT=frontend-oss
\ No newline at end of file
+# (2) Comment in and adjust the values as needed.
+
+# VITE_IS_ONLINE=true
+# VITE_WORKBOX_DEBUG=false
+# SENTRY_AUTH_TOKEN=YOUR_TOKEN
+# SENTRY_ORG=vikunja
+# SENTRY_PROJECT=frontend-oss
+# VIKUNJA_FRONTEND_BASE=/custom-subpath
\ No newline at end of file
diff --git a/vite.config.ts b/vite.config.ts
index b99634295..5308ee387 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,5 +1,5 @@
 /// <reference types="vitest" />
-import {defineConfig, type PluginOption} from 'vite'
+import {defineConfig, type PluginOption, loadEnv} from 'vite'
 import vue from '@vitejs/plugin-vue'
 import legacyFn from '@vitejs/plugin-legacy'
 import {URL, fileURLToPath} from 'node:url'
@@ -49,136 +49,143 @@ function createFontMatcher(fontNames: string[]) {
 }
 
 // https://vitejs.dev/config/
-export default defineConfig({
-	base: process.env.VIKUNJA_FRONTEND_BASE,
-	// https://vitest.dev/config/
-	test: {
-		environment: 'happy-dom',
-	},
-	css: {
-		preprocessorOptions: {
-			scss: {
-				additionalData: PREFIXED_SCSS_STYLES,
-				charset: false, // fixes  "@charset" must be the first rule in the file" warnings
+export default defineConfig(({mode}) => {
+	// Load env file based on `mode` in the current working directory.
+	// Set the third parameter to '' to load all env regardless of the `VITE_` prefix.
+	// https://vitejs.dev/config/#environment-variables
+	const env = loadEnv(mode, process.cwd(), '')
+
+	return {
+		base: env.VIKUNJA_FRONTEND_BASE,
+		// https://vitest.dev/config/
+		test: {
+			environment: 'happy-dom',
+		},
+		css: {
+			preprocessorOptions: {
+				scss: {
+					additionalData: PREFIXED_SCSS_STYLES,
+					charset: false, // fixes  "@charset" must be the first rule in the file" warnings
+				},
 			},
-		},
-		postcss: {
-			plugins: [
-				postcssEasings(),
-				postcssEasingGradients(),
-				postcssPresetEnv(),
-			],
-		},
-	},
-	plugins: [
-		vue({
-			reactivityTransform: true,
-		}),
-		legacy,
-		svgLoader({
-			// Since the svgs are already manually optimized via https://jakearchibald.github.io/svgomg/
-			// we don't need to optimize them again.
-			svgo: false,
-		}),
-		VueI18nPlugin({
-			// TODO: only install needed stuff
-			// Whether to install the full set of APIs, components, etc. provided by Vue I18n.
-			// By default, all of them will be installed.
-			fullInstall: true,
-			include: resolve(dirname(pathSrc), './src/i18n/lang/**'),
-		}),
-		// https://github.com/Applelo/vite-plugin-inject-preload
-		VitePluginInjectPreload({
-			files: [{
-				match: createFontMatcher(['Quicksand', 'OpenSans', 'OpenSans-Italic']),
-				attributes: {crossorigin: 'anonymous'},
-			}],
-			injectTo: 'custom',
-		}),
-		VitePWA({
-			srcDir: 'src',
-			filename: 'sw.ts',
-			strategies: 'injectManifest',
-			injectRegister: false,
-			manifest: {
-				name: 'Vikunja',
-				short_name: 'Vikunja',
-				theme_color: '#1973ff',
-				icons: [
-					{
-						src: './images/icons/android-chrome-192x192.png',
-						sizes: '192x192',
-						type: 'image/png',
-					},
-					{
-						src: './images/icons/android-chrome-512x512.png',
-						sizes: '512x512',
-						type: 'image/png',
-					},
-					{
-						src: './images/icons/icon-maskable.png',
-						sizes: '1024x1024',
-						type: 'image/png',
-						purpose: 'maskable',
-					},
-				],
-				start_url: '.',
-				display: 'standalone',
-				background_color: '#000000',
-				shortcuts: [
-					{
-						name: 'Overview',
-						url: '/',
-					},
-					{
-						name: 'Namespaces And Lists Overview',
-						short_name: 'Namespaces & Lists',
-						url: '/namespaces',
-					},
-					{
-						name: 'Tasks Next Week',
-						short_name: 'Next Week',
-						url: '/tasks/by/week',
-					},
-					{
-						name: 'Tasks Next Month',
-						short_name: 'Next Month',
-						url: '/tasks/by/month',
-					},
-					{
-						name: 'Teams Overview',
-						short_name: 'Teams',
-						url: '/teams',
-					},
+			postcss: {
+				plugins: [
+					postcssEasings(),
+					postcssEasingGradients(),
+					postcssPresetEnv(),
 				],
 			},
-		}),
-	],
-	resolve: {
-		alias: [
-			{
-				find: '@',
-				replacement: pathSrc,
-			},
+		},
+		plugins: [
+			vue({
+				reactivityTransform: true,
+			}),
+			legacy,
+			svgLoader({
+				// Since the svgs are already manually optimized via https://jakearchibald.github.io/svgomg/
+				// we don't need to optimize them again.
+				svgo: false,
+			}),
+			VueI18nPlugin({
+				// TODO: only install needed stuff
+				// Whether to install the full set of APIs, components, etc. provided by Vue I18n.
+				// By default, all of them will be installed.
+				fullInstall: true,
+				include: resolve(dirname(pathSrc), './src/i18n/lang/**'),
+			}),
+			// https://github.com/Applelo/vite-plugin-inject-preload
+			VitePluginInjectPreload({
+				files: [{
+					match: createFontMatcher(['Quicksand', 'OpenSans', 'OpenSans-Italic']),
+					attributes: {crossorigin: 'anonymous'},
+				}],
+				injectTo: 'custom',
+			}),
+			VitePWA({
+				srcDir: 'src',
+				filename: 'sw.ts',
+				strategies: 'injectManifest',
+				injectRegister: false,
+				manifest: {
+					name: 'Vikunja',
+					short_name: 'Vikunja',
+					theme_color: '#1973ff',
+					icons: [
+						{
+							src: './images/icons/android-chrome-192x192.png',
+							sizes: '192x192',
+							type: 'image/png',
+						},
+						{
+							src: './images/icons/android-chrome-512x512.png',
+							sizes: '512x512',
+							type: 'image/png',
+						},
+						{
+							src: './images/icons/icon-maskable.png',
+							sizes: '1024x1024',
+							type: 'image/png',
+							purpose: 'maskable',
+						},
+					],
+					start_url: '.',
+					display: 'standalone',
+					background_color: '#000000',
+					shortcuts: [
+						{
+							name: 'Overview',
+							url: '/',
+						},
+						{
+							name: 'Namespaces And Lists Overview',
+							short_name: 'Namespaces & Lists',
+							url: '/namespaces',
+						},
+						{
+							name: 'Tasks Next Week',
+							short_name: 'Next Week',
+							url: '/tasks/by/week',
+						},
+						{
+							name: 'Tasks Next Month',
+							short_name: 'Next Month',
+							url: '/tasks/by/month',
+						},
+						{
+							name: 'Teams Overview',
+							short_name: 'Teams',
+							url: '/teams',
+						},
+					],
+				},
+			}),
 		],
-		extensions: ['.mjs', '.js', '.ts', '.jsx', '.tsx', '.json', '.vue'],
-	},
-	server: {
-		host: '127.0.0.1', // see: https://github.com/vitejs/vite/pull/8543
-		port: 4173,
-		strictPort: true,
-	},
-	build: {
-		target: 'esnext',
-		rollupOptions: {
-			plugins: [
-				visualizer({
-					filename: 'stats.html',
-					gzipSize: true,
-					// template: 'sunburst',
-					// brotliSize: true,
-				}) as PluginOption,
+		resolve: {
+			alias: [
+				{
+					find: '@',
+					replacement: pathSrc,
+				},
 			],
+			extensions: ['.mjs', '.js', '.ts', '.jsx', '.tsx', '.json', '.vue'],
 		},
-	},
+		server: {
+			host: '127.0.0.1', // see: https://github.com/vitejs/vite/pull/8543
+			port: 4173,
+			strictPort: true,
+		},
+		build: {
+			target: 'esnext',
+			rollupOptions: {
+				plugins: [
+					visualizer({
+						filename: 'stats.html',
+						gzipSize: true,
+						// template: 'sunburst',
+						// brotliSize: true,
+					}) as PluginOption,
+				],
+			},
+		},
+	}
 })