added mongodb and mongo-express

docker-compose.local.yml

@@ -1,3 +1,4 @@
+version: '3.7'
 services:
   app:
     image: visual_critical_discourse_analysis:dev
@@ -9,7 +10,35 @@ services:
       - 8050:8050
     networks:
       - backend
+    depends_on:
+      - mongo
+  mongo:
+    image: mongo:latest
+    container_name: mongo
+    environment:
+      MONGO_INITDB_ROOT: root
+      MONGO_INITDB_PASSWORD: vSH7I7RxsDvb
+    ports:
+      - "27017:27017"
+    networks:
+      - backend
+  mongo-express:
+    image: mongo-express
+    ports:
+      - 8081:8081
+    environment:
+      ME_CONFIG_MONGODB_ADMINUSERNAME: root
+      ME_CONFIG_MONGODB_ADMINPASSWORD: vSH7I7RxsDvb
+      ME_CONFIG_MONGODB_PORT: 27017
+      ME_CONFIG_BASICAUTH_USERNAME: admin
+      ME_CONFIG_BASICAUTH_PASSWORD: q
+    links:
+      - mongo
+    networks:
+      - backend
+    depends_on:
+      - mongo
 
 networks:
   backend:
-    external: false
+    driver: bridge