v0.8.0 - New package and bug fixes

• Imageflow.Server.Configuration allows you to load an imageflow.toml file instead of config-as-code in Startup.cs
• Imageflow.Server.Host is an app that uses this to provide a copy-and-paste-into-IIS solution.
• We have dropped support for .NET 3.1 and .NET 5, just like Microsoft/Github.
• Dockerfiles now use ASP.NET 7 (the ideal target atm)
• We now send weak e-tags - no concrete bug or real-word case was identified but in theory, a very very slow (kbps) connection could cause a range-request that gets two different versions of a file if you have a tiny cache with tons of churn and non-deterministic compression.
• This might be FIPS compliant. FIPS compliance is bogus and deprecated but some obscure corps still enable it.