Startup.cs

using System.IO;
using cFunding.Data;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.FileProviders;
using System.Globalization; 

namespace cFunding
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IFileProvider>(  
            new PhysicalFileProvider(  
                Path.Combine(Directory.GetCurrentDirectory(), "wwwroot"))); 

            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddDbContext<AppliContext>(options => 
            options.UseNpgsql("server=localhost;port=your_port;database=db_name;user Id=postgres;password=your_password;Integrated Security=true;Pooling=true;"));

            services.AddMemoryCache();
            services.AddSession();
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1).AddJsonOptions(options =>
            {options.SerializerSettings.DateFormatString = "dddd, dd/mm/yyyy";});
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();

            app.UseSession();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
            app.UseRequestLocalization(); 
            var cultureInfo = new CultureInfo("en-US"); 
            CultureInfo.DefaultThreadCurrentCulture = cultureInfo; 
            CultureInfo.DefaultThreadCurrentUICulture = cultureInfo; 

        }
    }
}