Renamed services

Made configs and scripts consistent

docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3.9'
 
 services:
-  ref_test_server:
+  nginx:
     container_name: ref_test_server
     image: nginx:alpine
     volumes:
@@ -21,7 +21,7 @@ services:
       - ref_test_app
     command: "/bin/sh -c 'while :; do sleep 6h & wait $${!}; nginx -s reload; done & nginx -g \"daemon off;\"'"
   
-  ref_test_app:
+  app:
     container_name: ref_test_app
     image: reftest
     build: ./ref-test
@@ -38,7 +38,7 @@ services:
     depends_on:
       - ref_test_postfix
 
-  ref_test_postfix:
+  postfix:
     container_name: ref_test_postfix
     image: catatnight/postfix:latest
     restart: unless-stopped
@@ -49,7 +49,7 @@ services:
     networks:
       - backend
   
-  ref_test_certbot:
+  certbot:
     container_name: ref_test_certbot
     image: certbot/certbot
     volumes: