Initial implementation for the backend persistence of activities (#5)

Reviewed-on: #5
Co-authored-by: Jarno Kiesiläinen <jarnokie@gmail.com>
Co-committed-by: Jarno Kiesiläinen <jarnokie@gmail.com>

backend/pom.xml

@@ -49,8 +49,8 @@
 
         <!-- Database -->
         <dependency>
-            <groupId>com.h2database</groupId>
-            <artifactId>h2</artifactId>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
             <scope>runtime</scope>
         </dependency>
 
@@ -74,6 +74,12 @@
             <artifactId>spring-security-test</artifactId>
             <scope>test</scope>
         </dependency>
+        
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>test</scope>
+        </dependency>
 
         <!-- JSON Processing -->
         <dependency>
@@ -81,12 +87,31 @@
             <artifactId>jackson-databind</artifactId>
         </dependency>
 
+        <!-- Lombok -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.38</version>
+            <scope>provided</scope>
+        </dependency>
+
         <!-- API Documentation -->
         <dependency>
             <groupId>org.springdoc</groupId>
             <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
             <version>2.2.0</version>
         </dependency>
+
+        <!-- Flyway -->
+        <dependency>
+            <groupId>org.flywaydb</groupId>
+            <artifactId>flyway-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.flywaydb</groupId>
+            <artifactId>flyway-database-postgresql</artifactId>
+            <version>11.10.5</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -113,4 +138,4 @@
             </plugin>
         </plugins>
     </build>
-</project> 
+</project>