Integrate billing-service microservice: add API gateway routing, service discovery with Consul, Docker support, and Spring configuration. Update frontend with API integration, BillingRepository, and BillingViewModel.

backend/services/billing/billing-service/Dockerfile

@@ -0,0 +1,141 @@
+# syntax=docker/dockerfile:1.7
+
+# ===================================================================
+# Dockerfile for Billing Service
+# Based on Spring Boot Service Template with Billing-specific configuration
+# ===================================================================
+
+# === CENTRALIZED BUILD ARGUMENTS ===
+ARG GRADLE_VERSION
+ARG JAVA_VERSION
+ARG BUILD_DATE
+ARG VERSION
+
+# Service-specific arguments
+ARG SERVICE_PATH=billing/billing-service
+ARG SERVICE_NAME=billing-service
+
+# ===================================================================
+# Build Stage
+# ===================================================================
+FROM gradle:${GRADLE_VERSION}-jdk${JAVA_VERSION}-alpine AS builder
+
+# Re-declare build arguments for this stage
+ARG SERVICE_PATH=billing/billing-service
+ARG SERVICE_NAME=billing-service
+
+LABEL stage=builder
+LABEL maintainer="Meldestelle Development Team"
+
+WORKDIR /workspace
+
+# Gradle optimizations
+ENV GRADLE_OPTS="-Dorg.gradle.caching=true \
+                 -Dorg.gradle.daemon=false \
+                 -Dorg.gradle.parallel=true \
+                 -Dorg.gradle.configureondemand=true \
+                 -Xmx2g"
+
+# Copy build files in optimal order for caching
+COPY gradlew gradlew.bat gradle.properties settings.gradle.kts ./
+COPY gradle/ gradle/
+
+# Make gradlew executable
+RUN chmod +x gradlew
+
+COPY platform/ platform/
+COPY core/ core/
+COPY build.gradle.kts ./
+
+# Copy billing service modules
+COPY backend/services/billing/billing-domain/ backend/services/billing/billing-domain/
+COPY backend/services/billing/billing-service/ backend/services/billing/billing-service/
+
+# Build billing service
+RUN echo "Building Billing Service..." && \
+    ./gradlew :backend:services:billing:billing-service:dependencies --no-daemon --info && \
+    ./gradlew :backend:services:billing:billing-service:bootJar --no-daemon --info
+
+# Extract JAR layers
+WORKDIR /builder
+RUN cp /workspace/backend/services/billing/billing-service/build/libs/*.jar app.jar && \
+    java -Djarmode=layertools -jar app.jar extract
+
+# ===================================================================
+# Runtime Stage
+# ===================================================================
+FROM eclipse-temurin:${JAVA_VERSION}-jre-alpine AS runtime
+
+# Metadata
+LABEL service="billing-service" \
+      version="1.0.0" \
+      description="Billing and Financial Service for Austrian Equestrian Federation" \
+      maintainer="Meldestelle Development Team" \
+      java.version="${JAVA_VERSION}"
+
+# Build arguments
+ARG APP_USER=billinguser
+ARG APP_GROUP=billinggroup
+ARG APP_UID=1008
+ARG APP_GID=1008
+
+WORKDIR /app
+
+# System setup
+RUN apk update && \
+    apk upgrade && \
+    apk add --no-cache curl jq tzdata && \
+    rm -rf /var/cache/apk/*
+
+# Non-root user creation
+RUN addgroup -g ${APP_GID} -S ${APP_GROUP} && \
+    adduser -u ${APP_UID} -S ${APP_USER} -G ${APP_GROUP} -h /app -s /bin/sh
+
+# Directory setup
+RUN mkdir -p /app/logs /app/tmp && \
+    chown -R ${APP_USER}:${APP_GROUP} /app
+
+# Re-declare build arguments for runtime stage
+ARG SERVICE_PATH=billing/billing-service
+ARG SERVICE_NAME=billing-service
+
+# Copy Spring Boot layers
+COPY --from=builder --chown=${APP_USER}:${APP_GROUP} /builder/dependencies/ ./
+COPY --from=builder --chown=${APP_USER}:${APP_GROUP} /builder/spring-boot-loader/ ./
+COPY --from=builder --chown=${APP_USER}:${APP_GROUP} /builder/snapshot-dependencies/ ./
+COPY --from=builder --chown=${APP_USER}:${APP_GROUP} /builder/application/ ./
+
+USER ${APP_USER}
+
+# Expose application port and debug port
+EXPOSE 8087 5012
+
+# Health check
+HEALTHCHECK --interval=15s --timeout=3s --start-period=40s --retries=3 \
+    CMD curl -fsS --max-time 2 http://localhost:8087/actuator/health/readiness || exit 1
+
+# JVM configuration
+ENV JAVA_OPTS="-XX:MaxRAMPercentage=80.0 \
+    -XX:+UseG1GC \
+    -XX:+UseStringDeduplication \
+    -XX:+UseContainerSupport \
+    -Djava.security.egd=file:/dev/./urandom \
+    -Djava.awt.headless=true \
+    -Dfile.encoding=UTF-8 \
+    -Duser.timezone=Europe/Vienna"
+
+# Spring Boot configuration
+ENV SPRING_OUTPUT_ANSI_ENABLED=ALWAYS \
+    SERVER_PORT=8087 \
+    LOGGING_LEVEL_ROOT=INFO \
+    LOGGING_LEVEL_AT_MOCODE_BILLING=DEBUG
+
+# Startup command
+ENTRYPOINT ["sh", "-c", "\
+    echo 'Starting Billing Service on port 8087...'; \
+    if [ \"${DEBUG:-false}\" = \"true\" ]; then \
+        echo 'Debug mode enabled on port 5012'; \
+        exec java $JAVA_OPTS -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:5012 org.springframework.boot.loader.launch.JarLauncher; \
+    else \
+        exec java $JAVA_OPTS org.springframework.boot.loader.launch.JarLauncher; \
+    fi"]

backend/services/billing/billing-service/build.gradle.kts

@@ -21,6 +21,10 @@ dependencies {
   implementation(libs.spring.boot.starter.validation)
   implementation(libs.spring.boot.starter.actuator)
   implementation(libs.jackson.module.kotlin)
+  implementation(libs.spring.cloud.starter.consul.discovery)
+  implementation(libs.micrometer.tracing.bridge.brave)
+  implementation(libs.zipkin.reporter.brave)
+  implementation(libs.zipkin.sender.okhttp3)
 
   // Datenbank-Abhängigkeiten
   implementation(libs.exposed.core)

backend/services/billing/billing-service/src/main/kotlin/at/mocode/billing/service/BillingServiceApplication.kt

@@ -4,8 +4,10 @@ package at.mocode.billing.service
 
 import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.runApplication
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient
 import kotlin.uuid.ExperimentalUuidApi
 
+@EnableDiscoveryClient
 @SpringBootApplication
 class BillingServiceApplication