feat: add additional configuration from files

Endpoint/Program.cs

@@ -6,9 +6,26 @@ namespace Mirea.Api.Endpoint;
 
 public class Program
 {
+    private static IConfigurationRoot ConfigureEnvironment()
+    {
+        EnvironmentManager.LoadEnvironment(".env");
+        var environmentVariables = Environment.GetEnvironmentVariables()
+            .OfType<DictionaryEntry>()
+            .ToDictionary(
+                entry => entry.Key.ToString() ?? string.Empty,
+                entry => entry.Value?.ToString() ?? string.Empty
+            );
+
+        var result = new ConfigurationBuilder().AddInMemoryCollection(environmentVariables!);
+
+        return result.Build();
+    }
+
     public static void Main(string[] args)
     {
         var builder = WebApplication.CreateBuilder(args);
+        builder.Configuration.AddConfiguration(ConfigureEnvironment());
+        builder.Configuration.AddJsonFile(Settings.FilePath, optional: true, reloadOnChange: true);
 
         // Add services to the container.