nexus manifests added

nexus/README.md

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+docker stack deploy -c nexus.yml nexus
+
+

nexus/nexus.yml

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+version: '3.8'
+
+services:
+  nexus:
+    image: sonatype/nexus3:latest
+    ports:
+      - target: 8081
+        published: 8085
+        protocol: tcp
+        mode: host
+      - target: 5000
+        published: 5000
+        protocol: tcp
+        mode: host
+      - target: 5001
+        published: 5001
+        protocol: tcp
+        mode: host
+    environment:
+      - INSTALL4J_ADD_VM_PARAMS=-Xms2g -Xmx2g -XX:MaxDirectMemorySize=2g
+    volumes:
+      - nexus-data:/nexus-data
+    networks:
+      - nexus-net
+    deploy:
+      mode: replicated
+      replicas: 1
+      placement:
+        constraints:
+          - node.labels.platform == dev # Veri tutarlılığı için belirli bir node'a sabitlemek güvenlidir
+      resources:
+        limits:
+          memory: 4G
+        reservations:
+          memory: 2G
+
+networks:
+  nexus-net:
+    driver: overlay
+
+volumes:
+  nexus-data:
+    driver: local