feat: added Startup class

JOBot.Backend/Startup.cs

@@ -0,0 +1,25 @@
+using JOBot.Backend.DAL.Context;
+using JOBot.Backend.Services.gRPC;
+using Microsoft.EntityFrameworkCore;
+
+public class Startup
+{
+    public Startup(IConfiguration configuration)
+    {
+        Configuration = configuration;
+    }
+
+    public IConfiguration Configuration { get; }
+
+    public void ConfigureServices(IServiceCollection services)
+    {
+        services.AddGrpc();
+        services.AddDbContext<AppDbContext>(options =>
+            options.UseNpgsql(Configuration.GetConnectionString("PostgreSQL")));
+    }
+
+    public void Configure(WebApplication app, IWebHostEnvironment env)
+    {
+        app.MapGrpcService<UserService>();
+    }
+}