How to embed swagger.json as a resource of a dotnet assembly

I have an externally generated swagger.json file I want to create as an embedded resource for a middleware component hosted in ,net core 6 solution.

using a static file I can use the following code

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();
app.UseStaticFiles();

app.UseSwagger();
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger.json", "Credible FHIR"));


app.Run();

I then have 

wwwroot/swagger.json 

containing my static swagger content.

What I'd like to do is turn swagger.json content to an embedded resource and use that in my assembly.