Remove Gateway service and configuration

- Delete Gateway module, associated Spring Boot application, and related configuration (`GatewayApplication.java`, `application.yml`, and `pom.xml`).
- Remove Gateway references in `docker-compose.yml`, `.gitlab-ci.yml`, and `backend/pom.xml`.
- Update backend services to directly handle requests under `/api` prefix (e.g., `/api/customers`, `/api/contact`).
- Adjust frontend contact route to connect directly to the server, replacing gateway references with server URLs.

.run/GatewayApplication.run.xml

@@ -1,21 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="GatewayApplication" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot" nameIsGenerated="true">
-    <option name="envFilePaths">
-      <option value="$PROJECT_DIR$/gateway.env" />
-    </option>
-    <module name="gateway" />
-    <selectedOptions>
-      <option name="environmentVariables" />
-    </selectedOptions>
-    <option name="SPRING_BOOT_MAIN_CLASS" value="dev.rheinsw.gateway.GatewayApplication" />
-    <extension name="coverage">
-      <pattern>
-        <option name="PATTERN" value="dev.rheinsw.gateway.*" />
-        <option name="ENABLED" value="true" />
-      </pattern>
-    </extension>
-    <method v="2">
-      <option name="Make" enabled="true" />
-    </method>
-  </configuration>
-</component>

backend/.gitlab-ci.yml

@@ -7,7 +7,6 @@ build_backend:
   artifacts:
     paths:
       - backend/common/target/
-      - backend/gateway/target/
       - backend/discovery/target/
       - backend/server/target
     expire_in: 1 hour
@@ -21,18 +20,6 @@ docker_common:
   needs:
     - build_backend
 
-docker_gateway:
-  extends: .docker-build-template
-  variables:
-    IMAGE_NAME: gateway
-    COMMON_IMAGE: "$CI_REGISTRY/$CI_PROJECT_PATH/common"
-    WORKDIR_PATH: backend
-    DOCKERFILE_PATH: Dockerfile.app
-    BUILD_FOLDER: "gateway/target"
-    MAIN_CLASS: dev.rheinsw.gateway.GatewayApplication
-  needs:
-    - build_backend
-    - docker_common
 
 docker_server:
   extends: .docker-build-template

backend/gateway/pom.xml

@@ -1,88 +0,0 @@
-<?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</groupId>
-        <artifactId>backend</artifactId>
-        <version>1.0.0</version>
-    </parent>
-
-    <groupId>dev.rheinsw.backend</groupId>
-    <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>
-
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>${maven.compiler.plugin.version}</version>
-                <configuration>
-                    <source>${maven.compiler.source}</source>
-                    <target>${maven.compiler.target}</target>
-                    <annotationProcessorPaths>
-                        <path>
-                            <groupId>org.projectlombok</groupId>
-                            <artifactId>lombok</artifactId>
-                            <version>${lombok.version}</version>
-                        </path>
-                    </annotationProcessorPaths>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-dependency-plugin</artifactId>
-                <version>3.6.0</version>
-                <executions>
-                    <execution>
-                        <id>copy-dependencies</id>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>copy-dependencies</goal>
-                        </goals>
-                        <configuration>
-                            <outputDirectory>${project.build.directory}/libs</outputDirectory>
-                            <includeScope>runtime</includeScope>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
-
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework.cloud</groupId>
-            <artifactId>spring-cloud-starter-gateway</artifactId>
-        </dependency>
-        <!-- https://mvnrepository.com/artifact/com.github.ben-manes.caffeine/caffeine -->
-        <dependency>
-            <groupId>com.github.ben-manes.caffeine</groupId>
-            <artifactId>caffeine</artifactId>
-            <version>3.2.0</version>
-        </dependency>
-
-        <!-- Tools -->
-        <dependency>
-            <groupId>org.projectlombok</groupId>
-            <artifactId>lombok</artifactId>
-            <version>${lombok.version}</version>
-            <scope>provided</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>dev.rheinsw</groupId>
-            <artifactId>common</artifactId>
-            <version>1.0.0</version>
-            <scope>compile</scope>
-        </dependency>
-    </dependencies>
-
-</project>

backend/gateway/src/main/java/dev/rheinsw/gateway/GatewayApplication.java

@@ -1,15 +0,0 @@
-package dev.rheinsw.gateway;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-/**
- * @author Thatsaphorn Atchariyaphap
- * @since 04.05.25
- */
-@SpringBootApplication
-public class GatewayApplication {
-    public static void main(String[] args) {
-        SpringApplication.run(GatewayApplication.class, args);
-    }
-}

backend/gateway/src/main/resources/application.yml

@@ -1,19 +0,0 @@
-server:
-  port: 8080
-
-spring:
-  application:
-    name: gateway
-  main:
-    web-application-type: reactive  # Set the application type to reactive
-
-  cloud:
-    gateway:
-      routes:
-        - id: server
-          uri: http://${SERVER_HOST:localhost}:8081
-          predicates:
-            - Path=/api/**
-          filters:
-            - StripPrefix=1
-            - PreserveHostHeader

backend/pom.xml

@@ -11,7 +11,6 @@
 
     <modules>
         <module>common</module>
-        <module>gateway</module>
         <module>server</module>
     </modules>
 

backend/server/src/main/java/dev/rheinsw/server/contact/controller/ContactController.java

@@ -19,7 +19,7 @@ import org.springframework.web.bind.annotation.RestController;
  */
 @RestController
 @AllArgsConstructor
-@RequestMapping("/contact")
+@RequestMapping("/api/contact")
 public class ContactController {
 
     private static final Logger log = LoggerFactory.getLogger(ContactController.class);

backend/server/src/main/java/dev/rheinsw/server/customer/controller/CustomerController.java

@@ -24,7 +24,7 @@ import java.util.UUID;
  * @since 02.07.25
  */
 @RestController
-@RequestMapping("/customers")
+@RequestMapping("/api/customers")
 @RequiredArgsConstructor
 public class CustomerController extends AbstractController {
 

backend/server/src/main/java/dev/rheinsw/server/mail/controller/MailController.java

@@ -14,7 +14,7 @@ import org.springframework.web.bind.annotation.RestController;
  * @since 04.05.25
  */
 @RestController
-@RequestMapping("/mail")
+@RequestMapping("/api/mail")
 @RequiredArgsConstructor
 public class MailController {
 

backend/server/src/main/java/dev/rheinsw/server/project/controller/ProjectController.java

@@ -23,7 +23,7 @@ import java.util.UUID;
  * @since 12.07.25
  */
 @RestController
-@RequestMapping("/projects")
+@RequestMapping("/api/projects")
 @RequiredArgsConstructor
 public class ProjectController extends AbstractController {
 

backend/server/src/main/resources/application.yml

@@ -1,5 +1,5 @@
 server:
-  port: 8081
+  port: 8080
 
 spring:
   application:

docker-compose.yml

@@ -1,18 +1,11 @@
 services:
-  gateway:
-    image: registry.boomlab.party/rheinsw/rheinsw-mono-repo/gateway
-    container_name: gateway
-    env_file:
-      - ./gateway.env
-    restart: on-failure
-    networks:
-      - rheinsw-net
-
   server:
     image: registry.boomlab.party/rheinsw/rheinsw-mono-repo/server
     container_name: server
     env_file:
       - ./server.env
+    ports:
+      - "8080:8080"
     restart: on-failure
     networks:
       - rheinsw-net

frontend/app/api/contact/route.ts

@@ -3,10 +3,10 @@ import {NextRequest, NextResponse} from 'next/server'
 const HCAPTCHA_SECRET = process.env.HCAPTCHA_SECRET ?? ''
 const SHARED_API_KEY = process.env.SHARED_API_KEY ?? ''
 
-// Detect whether to use localhost or Docker gateway
+// Detect whether to use localhost or Docker server
-const useLocalGatewayEnv = process.env.USE_LOCAL_GATEWAY
+const useLocalServerEnv = process.env.USE_LOCAL_SERVER
-const useLocalGateway = useLocalGatewayEnv?.toLowerCase() === 'true'
+const useLocalServer = useLocalServerEnv?.toLowerCase() === 'true'
-const gatewayHost = useLocalGateway ? 'http://localhost:8080' : 'http://gateway:8080'
+const serverHost = useLocalServer ? 'http://localhost:8080' : 'http://server:8080'
 
 export async function POST(req: NextRequest) {
     try {
@@ -42,7 +42,7 @@ export async function POST(req: NextRequest) {
         // }
 
         // Step 2: Forward to backend service
-        const backendRes = await fetch(`${gatewayHost}/api/contact`, {
+        const backendRes = await fetch(`${serverHost}/api/contact`, {
             method: 'POST',
             headers: {
                 Origin: origin,