add test: has the database

Co-authored-by: Alexander Rudolph <drblaui@users.noreply.github.com>

server/tests/database.test.ts

+import { Client } from "pg";
+import { QueryTypes, Sequelize } from "sequelize";
+
+describe("Database Tests", () => {
+  it("has the database", () => {
+    const client = new Client({
+      user: process.env.DB_USER,
+      host: process.env.DB_HOST,
+      database: process.env.DB_NAME,
+      password: process.env.DB_PASSWORD,
+    });
+    client.connect();
+  });
+});
+
+const showAllDBs = async (sequelizeConnection: Sequelize) => {
+  const DBs = await sequelizeConnection.query(
+    "SELECT datname FROM pg_database",
+    { type: QueryTypes.SELECT }
+  );
+  console.log(
+    "----------Found Databases----------\n",
+    DBs,
+    "\n-----------------------------------\n"
+  );
+};