web: add basic ASP.NET Core web interface

PluralKit.Web/Startup.cs

@@ -0,0 +1,55 @@
+using System.Data;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Npgsql;
+
+namespace PluralKit.Web
+{
+    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)
+        {
+            var config = Configuration.GetSection("PluralKit").Get<CoreConfig>();
+            
+            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
+            
+            services
+                .AddSingleton<IDbConnection, NpgsqlConnection>(_ => new NpgsqlConnection(config.Database))
+                .AddSingleton<SystemStore>()
+                .AddSingleton<MemberStore>()
+                .AddSingleton(config);
+        }
+
+        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
+        public async void Configure(IApplicationBuilder app, IHostingEnvironment env)
+        {
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+            else
+            {
+                app.UseExceptionHandler("/Error");
+            }
+
+            //app.UseHttpsRedirection();
+            app.UseMvc();
+
+            var conn = app.ApplicationServices.GetRequiredService<IDbConnection>();
+            conn.Open();
+            
+            await Schema.CreateTables(conn);
+        }
+    }
+}