Directories need locking when locally unpacking repositories

[InfinityGhost]

fail: Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware[1]
      An unhandled exception has occurred while executing the request.
      System.IO.IOException: Cannot create '/tmp/GitHubRepositoryService/OpenTabletDriver/OpenTabletDriver' because a file or directory with the same name already exists.
         at System.IO.Directory.Move(String sourceDirName, String destDirName)
         at OpenTabletDriver.Web.Core.GitHub.Services.GitHubRepositoryService.DownloadAndExtract(String url, String owner, String name) in /build/mi2cqy0lqf12fk9mv9dbfs7akkrikv0l-source/OpenTabletDriver.Web.Core/GitHub/Services/GitHubRepositoryService.cs:line 97
         at OpenTabletDriver.Web.Core.GitHub.Services.GitHubRepositoryService.DownloadRepositoryTarball(Repository repository) in /build/mi2cqy0lqf12fk9mv9dbfs7akkrikv0l-source/OpenTabletDriver.Web.Core/GitHub/Services/GitHubRepositoryService.cs:line 54
         at OpenTabletDriver.Web.Core.GitHub.Services.GitHubRepositoryService.GetFileFromRepository(Repository repository, String relativePath) in /build/mi2cqy0lqf12fk9mv9dbfs7akkrikv0l-source/OpenTabletDriver.Web.Core/GitHub/Services/GitHubRepositoryService.cs:line 61
         at OpenTabletDriver.Web.Core.GitHub.Services.GitHubTabletService.GetMarkdownRawInternal(ICacheEntry entry) in /build/mi2cqy0lqf12fk9mv9dbfs7akkrikv0l-source/OpenTabletDriver.Web.Core/GitHub/Services/GitHubTabletService.cs:line 42
         at Microsoft.Extensions.Caching.Memory.CacheExtensions.GetOrCreateAsync[TItem](IMemoryCache cache, Object key, Func`2 factory)
         at OpenTabletDriver.Web.Controllers.TabletsController.Index(String search) in /build/mi2cqy0lqf12fk9mv9dbfs7akkrikv0l-source/OpenTabletDriver.Web/Controllers/TabletsController.cs:line 37
         at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeInnerFilterAsync>g__Awaited|13_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextResourceFilter>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResourceExecutedContextSealed context)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
         at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
         at Microsoft.AspNetCore.ResponseCaching.ResponseCachingMiddleware.Invoke(HttpContext httpContext)
         at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, Task task)