For Local Development, to Create a Self Signed Cert and then add it to the Trusted Root Certifcations.

Create Self Signed Cert and Add to Trusted Root.ps1

#Note : NOT FOR PRODUCTION USE. Development boxes only. 

Import-Module PKI


$tempPath = "C:\Temp"
$certPath = "$tempPath\SelfSignedCert.cer"
$dnsName =  '*.somedomain.com'

#Create Temp Folder
New-Item -ItemType Directory -Force -Path $tempPath

#Create Certificate
$SelfSignedCert = New-SelfSignedCertificate  -DnsName $dnsName  -CertStoreLocation cert:\LocalMachine\My
write-host "Self Signed Cert for $dnsName Created." -ForegroundColor DarkYellow

#Export Cert to File
Export-Certificate -Cert $SelfSignedCert -FilePath $certPath -Type CERT
write-host "Self Signed Cert for $dnsName Exported." -ForegroundColor DarkYellow

#Import Cert as Trusted Root Cert
Import-Certificate -FilePath $certPath -CertStoreLocation cert:\LocalMachine\root

#Check if its Installed.
$certInstalled = Get-ChildItem -Path Cert:\LocalMachine\root | where {$_.Thumbprint -eq $SelfSignedCert.Thumbprint}

if($certInstalled -ne $null)
{
    write-host "Self Signed Cert for $dnsName Installed." -ForegroundColor DarkYellow
}