Use version from Maven configuration for Swagger UI

pom.xml

@@ -161,6 +161,16 @@
 
 	<build>
 		<finalName>t2-modulith</finalName>
+		<!-- Enable resource filtering to be able to get the project version as an env var-->
+		<resources>
+			<resource>
+				<directory>${basedir}/src/main/resources</directory>
+				<filtering>true</filtering>
+				<includes>
+					<include>**/application*.yaml</include>
+				</includes>
+			</resource>
+		</resources>
 		<plugins>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>

src/main/java/de/unistuttgart/t2/modulith/config/OpenAPIConfiguration.java

@@ -1,6 +1,7 @@
 package de.unistuttgart.t2.modulith.config;
 
 import io.swagger.v3.oas.models.Components;
+import io.swagger.v3.oas.models.OpenAPI;
 import io.swagger.v3.oas.models.info.Info;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
@@ -10,12 +11,12 @@
 @Configuration
 public class OpenAPIConfiguration {
 
-    @Value("${T2_COMMON_VERSION:0.0.1}")
+    @Value("${info.app.version:unknown}")
     private String version;
 
     @Bean
-    public io.swagger.v3.oas.models.OpenAPI customOpenAPI() {
-        return new io.swagger.v3.oas.models.OpenAPI().components(new Components()).info(new Info()
+    public OpenAPI customOpenAPI() {
+        return new OpenAPI().components(new Components()).info(new Info()
             .title("T2 Modulith API")
             .description("API of the T2-Project's modulith implementation.")
             .version(version));

src/main/resources/application.yaml

@@ -1,4 +1,8 @@
 # Default profile (some values will be overwritten by other profiles)
+info:
+  app:
+    version: '@project.version@'
+
 spring:
   data:
     rest: