Add migrations and startup scripts

src/Printbase.WebApi/appsettings.Development.json

@@ -4,5 +4,11 @@
       "Default": "Information",
       "Microsoft.AspNetCore": "Warning"
     }
+  },
+  "ConnectionStrings": {
+    "DefaultConnection": "Server=localhost,${SQL_PORT};Database=PrintbaseDb;User Id=sa;Password=${SA_PASSWORD};TrustServerCertificate=True;"
+  },
+  "DatabaseOptions": {
+    "ApplyMigrationsAtStartup": true
   }
-}
+}