Init repo

src/MissionControl.Data/Composition.cs

@@ -0,0 +1,15 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace MissionControl.Data;
+
+public static class Composition
+{
+    public static IServiceCollection AddMissionControlData(
+        this IServiceCollection services,
+        string connectionString
+    ) =>
+        services.AddDbContext<MissionControlContext>(options =>
+            options.UseSqlServer(connectionString, sql => sql.EnableRetryOnFailure())
+        );
+}