Added DotEnv package and example.env file

PdfService/Program.cs

@@ -1,8 +1,16 @@
 using System.Data;
+using dotenv.net;
 using Microsoft.AspNetCore.WebUtilities;
 using Newtonsoft.Json;
 using PdfService;
 
+DotEnv.Load();
+
+SentrySdk.Init(options =>
+{
+    options.Dsn = Environment.GetEnvironmentVariable("SENTRY_DSN");
+});
+
 var builder = WebApplication.CreateBuilder(args);
 var app = builder.Build();