Update file Tag 3.md

Tag 3 KW 7/Tag 3.md

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+*Docker Compose
+`version: "3"
+
+services:
+
+  todoapp:
+
+    build: ./web-frontendv2
+
+    ports:
+
+     - "3000"
+
+     
+
+    depends_on:
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+     - redis-master
+
+     - redis-slave
+
+    networks:
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+     - todoapp_network
+
+  redis-slave:
+
+    build: ./redis-slave
+
+    depends_on:
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+     - redis-master
+
+    networks:
+
+     - todoapp_network
+
+  redis-master:
+
+    build: ./redis-master
+
+    networks:
+
+     - todoapp_network
+
+networks:
+
+  todoapp_network:
+
+    name: todoapp_network
+
+    driver: bridge`
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