docker compose added for handling replicaSets

Author: Gauravpadam

.dockerignore

@@ -1,4 +1,3 @@
 node_modules
 coverage
-logs
-.env
+logs

docker-compose.yaml

@@ -0,0 +1,47 @@
+version: '3'
+services:
+  backend:
+    build: ./
+    container_name: backend
+    ports:
+      - "4000:4000"
+    env_file:
+      - .env
+    depends_on:
+      - primary
+      - secondary1
+      - secondary2
+      - arbiter
+
+  primary:
+    image: mongo
+    container_name: mongodb-primary
+    ports:
+      - "27017:27017"
+    environment:
+      MONGO_INITDB_REPLICA_SET: ReplicaSet
+
+  secondary1:
+    image: mongo
+    container_name: mongodb-secondary1
+    ports:
+      - "27018:27017"
+    environment:
+      MONGO_INITDB_REPLICA_SET: ReplicaSet
+
+  secondary2:
+    image: mongo
+    container_name: mongodb-secondary2
+    ports:
+      - "27019:27017"
+    environment:
+      MONGO_INITDB_REPLICA_SET: ReplicaSet
+
+  arbiter:
+    image: mongo
+    container_name: mongodb-arbiter
+    ports:
+      - "27020:27017"
+    environment:
+      MONGO_INITDB_REPLICA_SET: ReplicaSet
+      MONGO_INITDB_ARBITER: "yes"