refactor: Update devcontainer setup and Docker Compose configuration

.devcontainer/docker-compose.yml

@@ -49,8 +49,6 @@ services:
     container_name: chat-mongodb
     expose:
       - 27017
-    # ports:
-    #   - 27018:27017
     image: mongo
     # restart: always
     volumes:
@@ -62,11 +60,8 @@ services:
     # restart: always
     expose:
       - 7700
-    # Uncomment this to access meilisearch from outside docker
-    # ports: 
-    #   - 7700:7700 # if exposing these ports, make sure your master key is not the default value
     environment:
       - MEILI_NO_ANALYTICS=true
-      - MEILI_MASTER_KEY=5c71cf56d672d009e36070b5bc5e47b743535ae55c818ae3b735bb6ebfb4ba63
+      - MEILI_MASTER_KEY=${MEILI_MASTER_KEY:-$(openssl rand -hex 16)}
     volumes:
       - ./meili_data_v1.5:/meili_data