Add project files.

Program.cs

@@ -0,0 +1,121 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
+using Microsoft.IdentityModel.Tokens;
+using Microsoft.OpenApi.Models;
+using System.Text;
+using LogisticsApp.Server.Data;
+using LogisticsApp.Server.Services;
+using LogisticsApp.Server.Middleware;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddControllers();
+builder.Services.AddEndpointsApiExplorer();
+
+// Configure Swagger
+builder.Services.AddSwaggerGen(c =>
+{
+    c.SwaggerDoc("v1", new OpenApiInfo
+    {
+        Title = "Logistics API",
+        Version = "v1",
+        Description = "API for Logistics Management System"
+    });
+
+
+    c.AddSecurityDefinition("Bearer", new OpenApiSecurityScheme
+    {
+        Description = "JWT Authorization header using the Bearer scheme. Example: \"Authorization: Bearer {token}\"",
+        Name = "Authorization",
+        In = ParameterLocation.Header,
+        Type = SecuritySchemeType.ApiKey,
+        Scheme = "Bearer"
+    });
+
+    c.AddSecurityRequirement(new OpenApiSecurityRequirement
+    {
+        {
+            new OpenApiSecurityScheme
+            {
+                Reference = new OpenApiReference
+                {
+                    Type = ReferenceType.SecurityScheme,
+                    Id = "Bearer"
+                }
+            },
+            new string[] {}
+        }
+    });
+});
+
+// Database Configuration
+builder.Services.AddDbContext<ApplicationDbContext>(options =>
+    options.UseNpgsql(builder.Configuration.GetConnectionString("DefaultConnection")));
+
+// JWT Authentication
+builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
+    .AddJwtBearer(options =>
+    {
+        options.TokenValidationParameters = new TokenValidationParameters
+        {
+            ValidateIssuer = true,
+            ValidateAudience = true,
+            ValidateLifetime = true,
+            ValidateIssuerSigningKey = true,
+            ValidIssuer = builder.Configuration["Jwt:Issuer"],
+            ValidAudience = builder.Configuration["Jwt:Audience"],
+            IssuerSigningKey = new SymmetricSecurityKey(
+                Encoding.UTF8.GetBytes(builder.Configuration["Jwt:Key"] ?? throw new InvalidOperationException("JWT Key not configured")))
+        };
+    });
+
+// Services
+builder.Services.AddScoped<IAuthService, AuthService>();
+
+// CORS for React client
+builder.Services.AddCors(options =>
+{
+    options.AddPolicy("ReactClient", policy =>
+    {
+        policy.WithOrigins("http://localhost:3000")
+              .AllowAnyHeader()
+              .AllowAnyMethod()
+              .AllowCredentials()
+              .WithExposedHeaders("Set-Cookie");
+    });
+});
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseCors("ReactClient");
+app.UseMiddleware<JwtMiddleware>();
+app.UseAuthentication();
+app.UseAuthorization();
+app.MapControllers();
+
+// Initialize database with sample data
+using (var scope = app.Services.CreateScope())
+{
+    var services = scope.ServiceProvider;
+    try
+    {
+        var context = services.GetRequiredService<ApplicationDbContext>();
+        context.Database.EnsureCreated();
+        await DbInitializer.Initialize(context);
+    }
+    catch (Exception ex)
+    {
+        var logger = services.GetRequiredService<ILogger<Program>>();
+        logger.LogError(ex, "An error occurred while seeding the database.");
+    }
+}
+
+app.Run();