Add support for .NET 7 (dotnet7)

[goenning]

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Tell us about your request

Upgrade an app from dotnet6 to dotnet7

Describe alternatives you've considered

Staying on dotnet6 🫠

Additional context

dotnet7 is faster and has been around for a while, would be great to have it on apprunner too!

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[nc-master]

AWS Is making hard our decision of staying here while working with dotnet.

[andreas-bergstrom]

You could use a docker image with whatever runtime you want in the meantime though?

[jsheld]

At this time, we are not adding support for .NET 7 as we are only targeting .NET LTS releases. Unfortunately, .NET 7 is a STS release. As suggested by @andreas-bergstrom, a Docker image with what you need published to ECR would probably be the easiest route for what you want. By the way, you can find .NET support policy information here: https://dotnet.microsoft.com/en-us/platform/support/policy/dotnet-core. Hope this helps.