Several features:

- Ability to serve static files, HTML and CSS are supported so far
 - Consequently, show a simple HTML form to enter the parameters when
   navigating to / (or /index.html).
 - Make the server multi-threaded (in a rather primitive way so far).
 - Use logback instead of the simple-slf4j logger.

pom.xml

@@ -14,6 +14,10 @@
 	<artifactId>labyrinth-server</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
 
+	<properties>
+		<slf4j.version>1.7.35</slf4j.version>
+	</properties>
+
 	<dependencies>
 		<dependency>
 			<groupId>ch.fritteli.labyrinth</groupId>
@@ -35,12 +39,12 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
-			<version>1.7.30</version>
+			<version>${slf4j.version}</version>
 		</dependency>
 		<dependency>
-			<groupId>org.slf4j</groupId>
-			<artifactId>slf4j-simple</artifactId>
-			<version>1.7.30</version>
+			<groupId>ch.qos.logback</groupId>
+			<artifactId>logback-classic</artifactId>
+			<version>1.2.10</version>
 		</dependency>
 		<dependency>
 			<groupId>org.junit.jupiter</groupId>
@@ -95,12 +99,24 @@
 	</distributionManagement>
 	<repositories>
 		<repository>
-			<id>repo.gittr.ch</id>
-			<url>https://repo.gittr.ch/</url>
+			<id>repo.gittr.ch.releases</id>
+			<url>https://repo.gittr.ch/releases/</url>
 			<releases>
 				<enabled>true</enabled>
 				<updatePolicy>never</updatePolicy>
 			</releases>
+			<snapshots>
+				<enabled>false</enabled>
+				<updatePolicy>never</updatePolicy>
+			</snapshots>
+		</repository>
+		<repository>
+			<id>repo.gittr.ch.snapshots</id>
+			<url>https://repo.gittr.ch/snapshots/</url>
+			<releases>
+				<enabled>false</enabled>
+				<updatePolicy>never</updatePolicy>
+			</releases>
 			<snapshots>
 				<enabled>true</enabled>
 				<updatePolicy>always</updatePolicy>