Initialize docker build configuration.

Dockerfile-backend

@@ -0,0 +1,15 @@
+FROM maven:3.9.9-eclipse-temurin-21 AS builder
+WORKDIR /app
+COPY backend/pom.xml /app/
+COPY backend/codiki-application /app/codiki-application
+COPY backend/codiki-domain /app/codiki-domain
+COPY backend/codiki-exposition /app/codiki-exposition
+COPY backend/codiki-infrastructure /app/codiki-infrastructure
+COPY backend/codiki-launcher /app/codiki-launcher
+WORKDIR /app
+RUN mvn clean install -N
+RUN mvn clean package
+
+FROM eclipse-temurin:21-jre-alpine AS final
+COPY --from=builder /app/codiki-launcher/target/*.jar /app/codiki.jar
+CMD ["java", "-jar", "/app/codiki.jar"]