added EXPOSE to Dockerfile

Dockerfile

@@ -18,4 +18,5 @@ RUN echo '{"locations":{"database":"/data/widerhall.sqlite3","configuration":"/d
 # get JQUERY
 RUN wget https://code.jquery.com/jquery-3.6.0.min.js -O static/jquery-3.6.0.min.js
 
-CMD java -jar widerhall.jar
+EXPOSE 80
+CMD java -jar widerhall.jar

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>org.example</groupId>
     <artifactId>Widerhall</artifactId>
-    <version>0.2.8</version>
+    <version>0.2.9</version>
     <build>
         <plugins>
             <plugin>