新增persistence.xml

Change-Id: Iac5541dce4055472e09ea140b9a277c2918ca01e
diff --git a/.env b/.env
new file mode 100644
index 0000000..ff8adc7
--- /dev/null
+++ b/.env
@@ -0,0 +1,4 @@
+DB_URL=jdbc:mysql://localhost:3306/pt_database
+DB_USER=root
+DB_PASSWORD=123456
+DB_DRIVER=com.mysql.cj.jdbc.Driver