feat: Add root-level Dockerfiles for monorepo deployment

- Add Dockerfile.server for backend deployment (port 8085)
- Add Dockerfile.client for frontend deployment (port 8086)
- Both build from monorepo root with multi-module Maven
- Configured for production with proper database and Keycloak settings

Dockerfile.server

@@ -0,0 +1,74 @@
+####
+# Dockerfile de production pour UnionFlow Server (Backend)
+# Build depuis la racine du monorepo
+####
+
+## Stage 1 : Build avec Maven
+FROM maven:3.9.6-eclipse-temurin-17 AS builder
+
+WORKDIR /app
+
+# Copier tous les POMs du monorepo
+COPY pom.xml .
+COPY unionflow-server-api/pom.xml unionflow-server-api/
+COPY unionflow-server-impl-quarkus/pom.xml unionflow-server-impl-quarkus/
+
+# Télécharger les dépendances
+RUN mvn dependency:go-offline -B
+
+# Copier le code source
+COPY unionflow-server-api/src unionflow-server-api/src
+COPY unionflow-server-impl-quarkus/src unionflow-server-impl-quarkus/src
+
+# Construire l'application
+RUN mvn clean package -DskipTests -B -Dquarkus.profile=prod -pl unionflow-server-impl-quarkus -am
+
+## Stage 2 : Image de production
+FROM eclipse-temurin:17-jre-alpine
+
+ENV LANGUAGE='en_US:en'
+ENV QUARKUS_PROFILE=prod
+ENV QUARKUS_HTTP_PORT=8085
+ENV QUARKUS_HTTP_HOST=0.0.0.0
+
+# Variables d'environnement pour production
+ENV DB_URL=jdbc:postgresql://postgresql-service.postgresql.svc.cluster.local:5432/unionflow
+ENV DB_USERNAME=unionflow
+ENV DB_PASSWORD=UnionFlow2025!
+
+ENV QUARKUS_OIDC_AUTH_SERVER_URL=https://security.lions.dev/realms/unionflow
+ENV QUARKUS_OIDC_CLIENT_ID=unionflow-server
+ENV KEYCLOAK_CLIENT_SECRET=unionflow-server-secret-2025
+ENV QUARKUS_OIDC_TLS_VERIFICATION=required
+
+ENV CORS_ORIGINS=https://unionflow.lions.dev,https://security.lions.dev
+ENV QUARKUS_HTTP_CORS_ORIGINS=${CORS_ORIGINS}
+
+# Installer curl pour health checks
+RUN apk add --no-cache curl
+
+# Créer utilisateur non-root
+RUN addgroup -g 185 -S appuser && adduser -u 185 -S appuser -G appuser
+RUN mkdir -p /app/logs && chown -R appuser:appuser /app/logs
+
+USER appuser
+
+# Copier l'application
+COPY --from=builder --chown=appuser:appuser /app/unionflow-server-impl-quarkus/target/quarkus-app/lib/ /deployments/lib/
+COPY --from=builder --chown=appuser:appuser /app/unionflow-server-impl-quarkus/target/quarkus-app/*.jar /deployments/
+COPY --from=builder --chown=appuser:appuser /app/unionflow-server-impl-quarkus/target/quarkus-app/app/ /deployments/app/
+COPY --from=builder --chown=appuser:appuser /app/unionflow-server-impl-quarkus/target/quarkus-app/quarkus/ /deployments/quarkus/
+
+EXPOSE 8085
+
+ENV JAVA_OPTS="-Xmx1g -Xms512m \
+    -XX:+UseG1GC \
+    -XX:MaxGCPauseMillis=200 \
+    -XX:+UseStringDeduplication \
+    -Djava.security.egd=file:/dev/./urandom \
+    -Dquarkus.profile=${QUARKUS_PROFILE}"
+
+ENTRYPOINT ["sh", "-c", "exec java $JAVA_OPTS -jar /deployments/quarkus-run.jar"]
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
+  CMD curl -f http://localhost:8085/q/health/ready || exit 1