create new empty database if not exists

Program.cs

@@ -1,7 +1,9 @@
 using System;
+using System.IO;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using Microsoft.Data.Sqlite;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Hosting;
@@ -13,9 +15,37 @@ namespace BuecherwurmAPI
     {
         public static void Main(string[] args)
         {
+            if (!File.Exists("LongWormMemory.db"))
+            {
+                CreateNewEmptyDB();
+                MakeImports();
+            }
             CreateHostBuilder(args).Build().Run();
         }
 
+        private static void MakeImports()
+        {
+            throw new NotImplementedException();
+        }
+
+        private static void CreateNewEmptyDB()
+        {
+            File.Create("LongWormMemory.db");
+            var connectionBuilder = new SqliteConnectionStringBuilder {DataSource = "LongWormMemory.db"};
+            var connection = new SqliteConnection(connectionBuilder.ConnectionString);
+            connection.Open();
+            using (var command = connection.CreateCommand())
+            {
+                command.CommandText = "CREATE TABLE Lends (Id INTEGER NOT NULL PRIMARY KEY, ItemId INTEGER NOT NULL, ReturnDate TEXT NOT NULL, Customer TEXT NOT NULL, Returned INTEGER NOT NULL)";
+                command.ExecuteNonQuery();
+                command.CommandText = "CREATE TABLE Items (ItemId INTEGER NOT NULL PRIMARY KEY, BookId INTEGER NOT NULL)";
+                command.ExecuteNonQuery();
+                command.CommandText = "CREATE TABLE Books (ProductId INTEGER PRIMARY KEY, Name TEXT, Author TEXT, Country TEXT, Link TEXT, Language TEXT, Pages INTEGER, Year INTEGER, Category INTEGER, ImageLink TEXT, LendTime INTEGER, LendType INTEGER)";
+                command.ExecuteNonQuery();
+            }
+        }
+
+
         public static IHostBuilder CreateHostBuilder(string[] args) =>
             Host.CreateDefaultBuilder(args)
                 .ConfigureWebHostDefaults(webBuilder =>