How to install .NetCore dotnet (not MSBuid plugin) to Jenkins - jenkins

Question

I was assigned to create CI/CD workflow for our project combining Openshift + Jenkins pipeline. I can build by using following:
stage('build') {
steps {
script {
openshift.withCluster() {
openshift.withProject() {
def buildSelector = openshift.selector("bc", "test")
buildSelector.startBuild()
buildSelector.logs('-f')
}
}
} // script
} // steps
} // stage
But I want to also use dotnet restore and other commands but pipeline returns:
/var/lib/jenkins/jobs/test-namespace/jobs/test-pipeline/workspace#tmp/durable-4265d26a/script.sh: line 1: dotnet: command not found
also when trying to use
agent {
docker { image 'mcr.microsoft.com/dotnet/aspnet:3.1' }
}
/var/lib/jenkins/jobs/test-namespace/jobs/test-pipeline/workspace#tmp/durable-4265d26a/script.sh: line 1: docker: command not found
This is my current script
pipeline {
agent {
node {
label ''
}
}
options {
// set a timeout of 20 minutes for this pipeline
timeout(time: 20, unit: 'MINUTES')
}
stage('build') {
steps {
script {
openshift.withCluster() {
openshift.withProject() {
def buildSelector = openshift.selector("bc", "test")
buildSelector.startBuild()
buildSelector.logs('-f')
}
}
} // script
} // steps
} // stage
stage('clean'){
steps {
script{
echo "${workspace} I want to call dotnet clean"
}
} // steps
} // stage
stage('restore'){
steps {
script{
echo "${workspace} I want to call dotnet restore"
}
} // steps
} // stage
stage('tests'){
steps {
script{
echo "${workspace} I want to call dotnet test *.sln"
}
} // steps
} // stage
stage('deploy') {
steps {
script {
openshift.withCluster() {
openshift.withProject() {
def deploySelector = openshift.selector("dc", "test")
deploySelector.startDeploy()
deploySelector.logs('-f')
}
}
} // script
} // steps
} // stage
}
}
How can I install those binaries to Jenkins? I am using minishift on MacOS.