Initial auth library commmit

lib/database/database.connection.ts

@@ -0,0 +1,11 @@
+import mongoose from 'mongoose';
+
+const DB_USER = process.env.DB_USER || 'test';
+const DB_PASS = process.env.DB_PASSWORD || 'test';
+const DB_HOST = process.env.DB_HOST || 'mongodb';
+const DB_PORT = process.env.DB_PORT || 27017;
+const DB_NAME = process.env.DB_NAME || 'auth';
+
+export const connection = mongoose.connect(
+    `${DB_USER}:${DB_PASS}@${DB_HOST}:${DB_PORT}/${DB_NAME}`
+);