deployment fixes

docker-compose.dev.yml

@@ -10,12 +10,12 @@ services:
     environment:
       AUTH_ENABLED: "false"
       SSH_KEY_DIRECTORY: /root/.ssh
-      SSH_KEY_NAME: ${SSH_KEY_NAME:-id_ed25519}
+      SSH_KEY_NAME: ${SSH_KEY_NAME}
     ports:
       - "8000:8000"
     volumes:
       - ./backend:/app/backend
-      - ./secrets/ssh:/root/.ssh:ro
+      - ${SSH_KEY_HOST_DIR}:/root/.ssh:ro
     restart: unless-stopped
 
   frontend: