chore: change container names

docker-compose.example.yml

@@ -2,7 +2,7 @@ services:
   server:
     image: standardnotes/server
     env_file: .env.sample
-    container_name: server-self-hosted
+    container_name: server_self_hosted
     ports:
       - 3000:3000
       - 3125:3104
@@ -13,7 +13,7 @@ services:
 
   localstack:
     image: localstack/localstack:1.3
-    container_name: localstack-self-hosted
+    container_name: localstack_self_hosted
     expose:
       - 4566
     restart: unless-stopped
@@ -30,7 +30,7 @@ services:
 
   db:
     image: mysql:8
-    container_name: db-self-hosted
+    container_name: db_self_hosted
     environment:
       - MYSQL_DATABASE=standard_notes_db
       - MYSQL_USER=std_notes_user
@@ -48,7 +48,7 @@ services:
 
   cache:
     image: redis:6.0-alpine
-    container_name: cache-self-hosted
+    container_name: cache_self_hosted
     volumes:
       - ./data/redis/:/data
     expose: