feat: full untested ansible setup

roles/bun_app/templates/bun-app.service.j2

@@ -0,0 +1,17 @@
+[Unit]
+Description={{ bun_app.name }} Bun service
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+User={{ bun_app.deploy_user }}
+Group={{ bun_app.deploy_group }}
+WorkingDirectory={{ bun_app.path }}
+EnvironmentFile=/etc/{{ bun_app.name }}/app.env
+ExecStart={{ bun_bin_path }} {{ bun_app.entrypoint }}
+Restart=always
+RestartSec=1
+
+[Install]
+WantedBy=multi-user.target