Add gateway and discovery modules to backend with CI/CD updates

.gitignore

@@ -5,3 +5,5 @@ backend/**/target
 
 finlog_app/**/.idea
 finlog_app/**/.dart_tool
+
+finlog_app/**/pubspec.lock

backend/.gitlab-ci.yml

@@ -7,5 +7,7 @@ build_backend:
   artifacts:
     paths:
       - backend/common/target/
-      - backend/server/target
+      - backend/discovery/target/
+      - backend/gateway/target/
+      - backend/server/target/
     expire_in: 1 hour

backend/discovery/pom.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>dev.rheinsw.finlog.backend</groupId>
+        <artifactId>backend</artifactId>
+        <version>${revision}</version>
+    </parent>
+
+    <artifactId>discovery</artifactId>
+</project>

backend/gateway/pom.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>dev.rheinsw.finlog.backend</groupId>
+        <artifactId>backend</artifactId>
+        <version>${revision}</version>
+    </parent>
+
+    <artifactId>gateway</artifactId>
+
+    <properties>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <!--    common    -->
+        <dependency>
+            <groupId>dev.rheinsw.finlog.backend</groupId>
+            <artifactId>common</artifactId>
+            <version>${revision}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+</project>

backend/pom.xml

@@ -12,6 +12,8 @@
     <modules>
         <module>common</module>
         <module>server</module>
+        <module>gateway</module>
+        <module>discovery</module>
     </modules>
 
     <properties>