Update to use ASP.NET Core 2.1 (preview 1) and HttpClientFactory.

Use Microsoft.AspNetCore.Mvc.Testing for integration tests.

Remove Microsoft.VisualStudio.Web.CodeGeneration.Tools as it appears to be failing to restore NuGet packages.

Update the version of the site to 2.1.0.

Use explicit versions of gulp and npm in CI.
Update to npm 5.7.1.

Add middlewares for HSTS and HTTP to HTTPS redirection.

Configure HSTS and remove header from custom middleware.

Fix integration tests by setting the test server base address to HTTPS.

Use in-process IIS hosting instead of the reverse-proxy hosting.

Update all npm packages to their latest versions.

Downgrade karma-typescript to a version that works.

Use Refit to call the TfL API.

Fix code analysis warnings for string comparisons.
Work around incorrect "assembly version missing" warnings.

Run gulp publish when the site project is opened.

Use Microsoft.AspNetCore.App instead of Microsoft.AspNetCore.All.

Update to preview 2 of .NET Core 2.1.
Update various other dependencies to their latest versions.

Update to release candidate 1 of .NET Core 2.1.
Update various other dependencies to their latest versions.

Use the early access NuGet feed to migrate to the RTM version of ASP.NET Core 2.1.

Update npm packages and lock file after merge.

Update to npm 6.1.0.

Refactor application startup to remove redundant setup of configuration, move configuration into the host building, remove the need to use TestStartup and prepare to remove StartupBase.

Reduce the log verbosity used when running on the console for local development.

Remove the separate StartupBase class and just use a single Startup class.

Remove redundant configuration for the application builder.

Remove the need to explicitly set the tests to run as Development instead of Production.

Fix logs being written to Serilog twice.

Update the log levels used in the tests to reduce CI verbosity (hopefully).

Remove configuration for IIS in-process hosting as this is no longer part of ASP.NET Core 2.1.0.

Remove the early-access download feed URL for 2.1.0 now that the packages have been published to nuget.org.

Revert to using tags to get the script to download the SDK.

Revert to karma 1.3.0 (for now) as it does not work in VSTS.

Migrate to puppeteer from PhantomJS as it doesn't work in VSTS anymore.

Downgrade console.error() to console.warn() when trying to register a service worker.