first push

PhotoShareDb/PhotoShareDbContextFactory.cs

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+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+using Microsoft.Extensions.Configuration;
+using System.IO;
+
+public class PhotoShareDbContextFactory : IDesignTimeDbContextFactory<PhotoShareDbContext>
+{
+    public PhotoShareDbContext CreateDbContext(string[] args)
+    {
+        // Récupère la configuration depuis appsettings.json
+        var configuration = new ConfigurationBuilder()
+            .SetBasePath(Directory.GetCurrentDirectory())
+            .AddJsonFile("appsettings.json")
+            .Build();
+
+        var optionsBuilder = new DbContextOptionsBuilder<PhotoShareDbContext>();
+        var connectionString = configuration.GetConnectionString("DefaultConnection");
+
+        optionsBuilder.UseNpgsql(connectionString);
+
+        return new PhotoShareDbContext(optionsBuilder.Options);
+    }
+}