add r2dbc spring data to support reactive datasource

Makefile

@@ -14,3 +14,4 @@ docker-build:
 
 docker-run:
 	docker run --rm -d -p 8080:8080 docker.registry:5000/wikiproject:latest
+

pom.xml

@@ -55,6 +55,14 @@
             <scope>runtime</scope>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-r2dbc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.r2dbc</groupId>
+            <artifactId>r2dbc-h2</artifactId>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/tk/antoine_roux/wiki/configuration/DatabaseConfiguration.java

@@ -0,0 +1,15 @@
+package tk.antoine_roux.wiki.configuration;
+
+import io.r2dbc.spi.ConnectionFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.r2dbc.core.DatabaseClient;
+
+@Configuration
+public class DatabaseConfiguration {
+
+    @Bean
+    public DatabaseClient getDatabase(ConnectionFactory connectionFactory) {
+        return DatabaseClient.create(connectionFactory);
+    }
+}