diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 362d54e..d02bd71 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -5,6 +5,7 @@ FROM node:16 as builder
 # ENV API_URL=http://api:80
 ENV API_URL=https://mawoka.eu
 ENV REDIS_URL=$REDIS
+ENV VITE_HCAPTCHA=ee81b2a1-acf3-4d20-b2a4-a7ea94c7eba5
 ENV VITE_SENTRY=https://4981de1f72f24fd7b5e21b8913b93a02@o661934.ingest.sentry.io/6254641
 # change working directory
 WORKDIR /usr/src/app
diff --git a/frontend/package.json b/frontend/package.json
index 629ee5e..f989ee3 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -31,6 +31,7 @@
 		"eslint-config-prettier": "^8.3.0",
 		"eslint-plugin-svelte3": "^3.2.1",
 		"felte": "^1.0.1",
+		"highlight.js": "^11.4.0",
 		"ioredis": "^4.28.5",
 		"js-cookie": "^3.0.1",
 		"luxon": "^2.3.1",
diff --git a/frontend/pnpm-lock.yaml b/frontend/pnpm-lock.yaml
index 36a7c54..6df065d 100644
--- a/frontend/pnpm-lock.yaml
+++ b/frontend/pnpm-lock.yaml
@@ -19,6 +19,7 @@ specifiers:
   eslint-config-prettier: ^8.3.0
   eslint-plugin-svelte3: ^3.2.1
   felte: ^1.0.1
+  highlight.js: ^11.4.0
   ioredis: ^4.28.5
   js-cookie: ^3.0.1
   luxon: ^2.3.1
@@ -57,6 +58,7 @@ devDependencies:
   eslint-config-prettier: 8.4.0_eslint@7.32.0
   eslint-plugin-svelte3: 3.4.1_eslint@7.32.0+svelte@3.46.4
   felte: 1.0.1_svelte@3.46.4
+  highlight.js: 11.4.0
   ioredis: 4.28.5
   js-cookie: 3.0.1
   luxon: 2.3.1
@@ -1450,6 +1452,11 @@ packages:
       function-bind: 1.1.1
     dev: true
 
+  /highlight.js/11.4.0:
+    resolution: {integrity: sha512-nawlpCBCSASs7EdvZOYOYVkJpGmAOKMYZgZtUqSRqodZE0GRVcFKwo1RcpeOemqh9hyttTdd5wDBwHkuSyUfnA==}
+    engines: {node: '>=12.0.0'}
+    dev: true
+
   /ignore/4.0.6:
     resolution: {integrity: sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==}
     engines: {node: '>= 4'}
diff --git a/frontend/src/lib/hljs.css b/frontend/src/lib/hljs.css
new file mode 100644
index 0000000..05efc04
--- /dev/null
+++ b/frontend/src/lib/hljs.css
@@ -0,0 +1,86 @@
+pre code.hljs {
+	display: block;
+	overflow-x: auto;
+	padding: 1em;
+}
+code.hljs {
+	padding: 3px 5px;
+} /*!
+  Theme: a11y-dark
+  Author: @ericwbailey
+  Maintainer: @ericwbailey
+
+  Based on the Tomorrow Night Eighties theme: https://github.com/isagalaev/highlight.js/blob/master/src/styles/tomorrow-night-eighties.css
+*/
+.hljs {
+	background: transparent;
+	color: #f8f8f2;
+}
+.hljs-comment,
+.hljs-quote {
+	color: #d4d0ab;
+}
+.hljs-deletion,
+.hljs-name,
+.hljs-regexp,
+.hljs-selector-class,
+.hljs-selector-id,
+.hljs-tag,
+.hljs-template-variable,
+.hljs-variable {
+	color: #ffa07a;
+}
+.hljs-built_in,
+.hljs-link,
+.hljs-literal,
+.hljs-meta,
+.hljs-number,
+.hljs-params,
+.hljs-type {
+	color: #f5ab35;
+}
+.hljs-attribute {
+	color: gold;
+}
+.hljs-addition,
+.hljs-bullet,
+.hljs-string,
+.hljs-symbol {
+	color: #abe338;
+}
+.hljs-section,
+.hljs-title {
+	color: #00e0e0;
+}
+.hljs-keyword,
+.hljs-selector-tag {
+	color: #dcc6e0;
+}
+.hljs-emphasis {
+	font-style: italic;
+}
+.hljs-strong {
+	font-weight: 700;
+}
+@media screen and (-ms-high-contrast: active) {
+	.hljs-addition,
+	.hljs-attribute,
+	.hljs-built_in,
+	.hljs-bullet,
+	.hljs-comment,
+	.hljs-link,
+	.hljs-literal,
+	.hljs-meta,
+	.hljs-number,
+	.hljs-params,
+	.hljs-quote,
+	.hljs-string,
+	.hljs-symbol,
+	.hljs-type {
+		color: highlight;
+	}
+	.hljs-keyword,
+	.hljs-selector-tag {
+		font-weight: 700;
+	}
+}
diff --git a/frontend/src/lib/play/join.svelte b/frontend/src/lib/play/join.svelte
index 94f5ebb..d299ded 100644
--- a/frontend/src/lib/play/join.svelte
+++ b/frontend/src/lib/play/join.svelte
@@ -1,16 +1,18 @@
-<script lang="ts">
+<script lang='ts'>
 	import { socket } from '$lib/socket';
 	import { onDestroy, onMount } from 'svelte';
 	import { browser } from '$app/env';
+	import * as Sentry from "@sentry/browser";
 
 	export let game_pin: string;
 
 	let username = '';
-	let hcaptchaSitekey = 'ee81b2a1-acf3-4d20-b2a4-a7ea94c7eba5';
+	let hcaptchaSitekey = import.meta.env.VITE_HCAPTCHA;
 
 	let hcaptcha = {
 		execute: async (_a, _b) => ({ response: '' }),
-		render: (_a, _b) => {}
+		render: (_a, _b) => {
+		}
 	};
 	let hcaptchaWidgetID;
 
@@ -31,7 +33,8 @@
 		if (browser) {
 			hcaptcha = {
 				execute: async () => ({ response: '' }),
-				render: () => {}
+				render: () => {
+				}
 			};
 		}
 	});
@@ -40,13 +43,23 @@
 		if (username.length <= 3) {
 			return;
 		}
-		const { response } = await hcaptcha.execute(hcaptchaWidgetID, {
-			async: true
-		});
+		let captcha_resp;
+		try {
+			const { response } = await hcaptcha.execute(hcaptchaWidgetID, {
+				async: true
+			});
+			captcha_resp = response;
+		} catch (e) {
+			if (import.meta.env.VITE_SENTRY !== null){
+				Sentry.captureException(e);
+			}
+			alert('Captcha failed, reloading the page probably helps!');
+			window.location.reload();
+		}
 		socket.emit('join_game', {
 			username: username,
 			game_pin: game_pin,
-			captcha: response
+			captcha: captcha_resp
 		});
 	};
 	socket.on('game_not_found', () => {
@@ -56,27 +69,27 @@
 </script>
 
 <svelte:head>
-	<script src="https://js.hcaptcha.com/1/api.js?render=explicit" async defer></script>
+	<script src='https://js.hcaptcha.com/1/api.js?render=explicit' async defer></script>
 </svelte:head>
 
 {#if game_pin === '' || game_pin.length <= 7}
-	<div class="flex flex-col justify-center align-center w-screen h-screen">
+	<div class='flex flex-col justify-center align-center w-screen h-screen'>
 		<form
 			on:submit|preventDefault={() => {}}
-			class="flex-col flex justify-center align-center mx-auto"
+			class='flex-col flex justify-center align-center mx-auto'
 		>
-			<h1 class="text-lg text-center">Game Pin</h1>
+			<h1 class='text-lg text-center'>Game Pin</h1>
 			<input
-				class="border border-amber-800 self-center text-center text-black"
+				class='border border-amber-800 self-center text-center text-black'
 				bind:value={game_pin}
-				maxlength="8"
+				maxlength='8'
 			/>
 			<!--				use:tippy={{content: "Please enter the game pin", sticky: true, placement: 'top'}}-->
 
 			<br />
 			<button
-				class="bg-amber-800 hover:bg-amber-700 text-white font-bold py-2 px-4 rounded disabled:opacity-50 disabled:cursor-not-allowed mt-2"
-				type="submit"
+				class='bg-amber-800 hover:bg-amber-700 text-white font-bold py-2 px-4 rounded disabled:opacity-50 disabled:cursor-not-allowed mt-2'
+				type='submit'
 				disabled={game_pin.length <= 7}
 			>
 				Submit
@@ -84,16 +97,16 @@
 		</form>
 	</div>
 {:else}
-	<div class="flex flex-col justify-center align-center w-screen h-screen">
+	<div class='flex flex-col justify-center align-center w-screen h-screen'>
 		<form
 			on:submit|preventDefault={setUsername}
-			class="flex-col flex justify-center align-center mx-auto"
+			class='flex-col flex justify-center align-center mx-auto'
 		>
-			<h1 class="text-lg text-center">Username</h1>
-			<input class="border border-amber-800 text-black text-center" bind:value={username} />
+			<h1 class='text-lg text-center'>Username</h1>
+			<input class='border border-amber-800 text-black text-center' bind:value={username} />
 			<button
-				class="bg-amber-800 hover:bg-amber-700 text-white font-bold py-2 px-4 rounded disabled:cursor-not-allowed disabled:opacity-50 mt-2"
-				type="submit"
+				class='bg-amber-800 hover:bg-amber-700 text-white font-bold py-2 px-4 rounded disabled:cursor-not-allowed disabled:opacity-50 mt-2'
+				type='submit'
 				disabled={username.length <= 3}
 			>
 				Submit
@@ -102,9 +115,9 @@
 	</div>
 {/if}
 <div
-	id="hcaptcha"
-	class="h-captcha"
+	id='hcaptcha'
+	class='h-captcha'
 	data-sitekey={hcaptchaSitekey}
-	data-size="invisible"
-	data-theme="dark"
+	data-size='invisible'
+	data-theme='dark'
 />
diff --git a/frontend/src/routes/__layout.svelte b/frontend/src/routes/__layout.svelte
index d07b704..ab30ed2 100644
--- a/frontend/src/routes/__layout.svelte
+++ b/frontend/src/routes/__layout.svelte
@@ -30,16 +30,17 @@
 
 <style lang='scss'>
   :global(body) {
-    background: linear-gradient(to right, #009444, #39b54a, #8dc63f);
     // height: 100%;
     // width: 100%;
-    background-repeat: no-repeat;
+    background: linear-gradient(to right, #009444, #39b54a, #8dc63f) repeat-y;
     background-size: cover;
     /*background: linear-gradient(-225deg, #231557 0%, #44107A 29%, #FF1361 67%, #FFF800 100%); */
     /*background: linear-gradient(-225deg, #22E1FF 0%, #1D8FE1 48%, #625EB1 100%); */
     color: beige;
-    background-size: 400% 400%;
-    animation: background_animation 30s ease infinite;
+
+    // background-size: 400% 400%;
+
+    //animation: background_animation 5s ease infinite;
   }
 
   @keyframes background_animation {
diff --git a/frontend/src/routes/docs/index.svelte b/frontend/src/routes/docs/index.svelte
index adab662..b1c6c22 100644
--- a/frontend/src/routes/docs/index.svelte
+++ b/frontend/src/routes/docs/index.svelte
@@ -10,6 +10,9 @@
 		<li>
 			<a href='/docs/import-from-kahoot'>Import from Kahoot</a>
 		</li>
+		<li>
+			<a href='/docs/self-host'>Self-hosting</a>
+		</li>
 	</ul>
 
 </article>
\ No newline at end of file
diff --git a/frontend/src/routes/docs/self-host.svelte b/frontend/src/routes/docs/self-host.svelte
new file mode 100644
index 0000000..86dcdcf
--- /dev/null
+++ b/frontend/src/routes/docs/self-host.svelte
@@ -0,0 +1,112 @@
+<script lang='ts'>
+	import { onMount } from 'svelte';
+	import '$lib/hljs.css';
+
+	onMount(async () => {
+		const { default: hljs } = await import('highlight.js/lib/common');
+		hljs.highlightAll();
+	});
+</script>
+<article
+	class='prose prose-sm sm:prose lg:prose-lg xl:prose-xl mx-auto mt-10 prose-pink text-yellow-50 px-4'
+>
+	<h1>Self-Hosting</h1>
+	<p>Since ClassQuiz is open-source, it can also be self-hosted.</p>
+
+	<h2>Requirements</h2>
+	<ul>
+		<li><a href='https://docker.com'>Docker</a></li>
+		<li><a href='https://git-scm.com/'>Git</a></li>
+		<li>A <a href='https://redis.com'>Redis</a>-Server (I recommend <a href='https://upstash.com'>Upstash</a>)</li>
+	</ul>
+
+	<h2>Installation</h2>
+	<p>
+		At first, clone the repo:
+	</p>
+
+	<pre><code class='language-bash'>git clone https://github.com/mawoka-myblock/classquiz && cd ClassQuiz</code></pre>
+	<p>
+		Now, set a <b>VALID</b> Redis-URI in <code>frontend/Dockerfile</code> and, if you Sentry want, a valid
+		Sentry-DSN.
+	</p>
+	<p>
+		You must set a valid hCaptcha-Sitekey in the <code>frontend/Dockerfile</code>.
+	</p>
+
+	<h2>Configuration</h2>
+	<p>
+		Before you can start your stack, you have to set some environment-variables in your
+		<code>docker-compose.yml</code>.
+	</p>
+	<pre><code class='language-yaml'>version: "3"
+
+services:
+  frontend:
+    restart: always
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    depends_on:
+      - redis
+      - api
+    environment:
+      REDIS_URL: redis://redis:6379/0?decode_responses=True # For runtime
+      API_URL: http://api:80 # For runtime
+  api:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    restart: always
+    depends_on:
+      - db
+      - redis
+
+    environment:
+      ROOT_ADDRESS: "https://classquiz.mawoka.eu" # Base-URL
+      DB_URL: "postgresql://postgres:classquiz@db:5432/classquiz"
+      MAIL_ADDRESS: "classquiz@mawoka.eu" # Email-Address
+      MAIL_PASSWORD: "MAIL_PASSWORD" # Email-Password
+      MAIL_USERNAME: "classquiz@mawoka.eu" # Email-Username
+      MAIL_SERVER: "smtp.gmail.com" # SMTP-Server
+      MAX_WORKERS: "1" # Very important and don't change it!
+      MAIL_PORT: "587" # SMTP-Port
+      REDIS: "redis://redis:6379/0?decode_responses=True" # decode_response is important!
+      SECRET_KEY: "ghfvfgjgvjgvbh" # openssl rand -hex 32
+      ACCESS_TOKEN_EXPIRE_MINUTES: 30
+      HCAPTCHA_KEY: "" # Private hCaptcha key for verification
+  redis:
+    image: redis:alpine
+    restart: always
+    healthcheck:
+      test: [ "CMD", "redis-cli","ping" ]
+
+  db:
+    image: postgres:alpine
+    restart: always
+    healthcheck:
+      test: [ "CMD-SHELL", "pg_isready -U postgres" ]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    environment:
+      POSTGRES_PASSWORD: "classquiz"
+      POSTGRES_DB: "classquiz"
+
+    volumes:
+      - data:/var/lib/postgresql/data
+  proxy:
+    image: caddy:alpine
+    restart: always
+    volumes:
+      - ./Caddyfile-docker:/etc/caddy/Caddyfile
+    ports:
+      - "8000:8080" # Adjust the 8000 to your needs
+
+volumes:
+  data:
+	</code></pre>
+	<p>Now build and deploy:</p>
+	<pre><code class='language-bash'>docker compose build && docker compose up -d</code></pre>
+
+</article>
\ No newline at end of file