feat(compose): remove `expose` directive

docker-compose.yaml

@@ -3,8 +3,6 @@ services:
     build:
       context: .
       dockerfile: searxng.dockerfile
-    expose:
-      - 4000
     ports:
       - 4000:8080
     networks:
@@ -18,8 +16,6 @@ services:
         - SEARXNG_API_URL=http://searxng:8080
     depends_on:
       - searxng
-    expose:
-      - 3001
     ports:
       - 3001:3001
     networks:
@@ -34,12 +30,10 @@ services:
         - NEXT_PUBLIC_WS_URL=ws://127.0.0.1:3001
     depends_on:
       - perplexica-backend
-    expose:
-      - 3000
     ports:
       - 3000:3000
     networks:
       - perplexica-network
 
 networks:
-  perplexica-network:
+  perplexica-network: