Refactor Docker Compose configuration and add email backend documentation

documentation/docs/Configuration/email_backend.md

@@ -0,0 +1,28 @@
+---
+sidebar_position: 2
+---
+
+# Change Email Backend
+
+To change the email backend, you can set the following variable in your docker-compose.yml under the server service:
+
+## Using Console (default)
+
+```yaml
+environment:
+  - EMAIL_BACKEND='console'
+```
+
+## With SMTP
+
+```yaml
+environment:
+  - EMAIL_BACKEND='email'
+  - EMAIL_HOST='smtp.gmail.com'
+  - EMAIL_USE_TLS=False
+  - EMAIL_PORT=587
+  - EMAIL_USE_SSL=True
+  - EMAIL_HOST_USER='user'
+  - EMAIL_HOST_PASSWORD='password'
+  - DEFAULT_FROM_EMAIL='user@example.com'
+```

frontend/src/routes/collections/[id]/+page.svelte

@@ -517,9 +517,12 @@
 					dateString
 				] || []}
 
-			<h2 class="text-center font-semibold text-2xl mb-2 mt-4">
-				Day {i + 1} - {adjustedDate.toLocaleDateString(undefined, { timeZone: 'UTC' })}
+			<h2 class="text-center font-bold text-3xl mt-4">
+				Day {i + 1}
 			</h2>
+			<h3 class="text-center text-xl mb-2">
+				{adjustedDate.toLocaleDateString(undefined, { timeZone: 'UTC' })}
+			</h3>
 			<div class="flex flex-wrap gap-4 mr-4 justify-center content-center">
 				{#if dayAdventures.length > 0}
 					{#each dayAdventures as adventure}