FROM docker.m.our-intra.net/microsoft/dotnet:2.1-sdk
WORKDIR /app
COPY . ./aspnetapp/
WORKDIR /app/aspnetapp
RUN dotnet publish -c Release -o out

FROM docker.m.our-intra.net/microsoft/dotnet:2.1.4-aspnetcore-runtime
WORKDIR /app
COPY --from=docker.m.our-intra.net/microsoft/dotnet:2.1-sdk /app/aspnetapp/MyProject.WebApi/out ./
ENTRYPOINT ["dotnet", "MyProject.WebApi.dll"]

FROM docker.m.our-intra.net/microsoft/dotnet:2.1-sdk AS build
WORKDIR /app
COPY . ./aspnetapp/
WORKDIR /app/aspnetapp
RUN dotnet publish -c Release -o out

FROM docker.m.our-intra.net/microsoft/dotnet:2.1.4-aspnetcore-runtime AS runtime
WORKDIR /app
COPY --from=build /app/aspnetapp/MyProject.WebApi/out ./
ENTRYPOINT ["dotnet", "MyProject.WebApi.dll"]

FROM docker.m.our-intra.net/microsoft/dotnet:2.1-sdk
WORKDIR /app
COPY . ./aspnetapp/
WORKDIR /app/aspnetapp
RUN dotnet publish -c Release -o out

FROM docker.m.our-intra.net/microsoft/dotnet:2.1.4-aspnetcore-runtime
COPY . .
ENTRYPOINT ["dotnet", "MyProject.WebApi.dll"]

def docker_repository_url = 'docker.m.our-intra.net'
def artifact_group = 'some-artifact-group'
def artifact_name = 'my-service-api'

pipeline {
    agent {
        label 'build'
    }
    stages {
        stage('Checkout') {
            steps {
                script {
                    echo 'Checkout...'
                    checkout scm
                    echo 'Checkout Completed'
                }
            }
        }
        stage('Build') {
            steps {
                script {
                    echo 'Build...'
                    sh 'docker version'
                    sh 'docker build -t fact:v${BUILD_NUMBER} -f Dockerfile-build .'
                    echo 'Build Completed'
                }
            }
        }
        stage('Extract artifact') {
            steps {
                script {
                    echo 'Extract...'
                    sh 'docker create --name build-stage-container fact:v${BUILD_NUMBER}'
                    sh 'docker cp build-stage-container:/app/aspnetapp/MyProject.WebApi/out .'
                    sh 'docker rm -f build-stage-container'
                    echo 'Extract Completed'
                }
            }
        }
        stage('Copy compiled artifact') {
            steps {
                script {
                    echo 'Copy artifact...'
                    sh "docker build -t ${docker_repository_url}/${artifact_group}/${artifact_name}:v${BUILD_NUMBER} -f Dockerfile ."
                    echo 'Copy artifact Completed'
                }
            }
        }
        stage('Push image') {
            steps {
                script {
                    withCredentials([[
                        $class: 'UsernamePasswordMultiBinding',
                        credentialsId: 'jenkins',
                        usernameVariable: 'USERNAME',
                        passwordVariable: 'PASSWORD'
                    ]]) {
                            def username = env.USERNAME
                            def password = env.PASSWORD

                            echo 'Login...'
                            sh "docker login ${docker_repository_url} -u ${username} -p ${password}"
                            echo 'Login Successful'

                            echo 'Push image...'
                            sh "docker push ${docker_repository_url}/${artifact_group}/${artifact_name}:v${BUILD_NUMBER}"
                            echo 'Push image Completed'
                    }
                }
            }
        }
    }
}

FROM docker.m.our-intra.net/microsoft/dotnet:2.1-sdk
...

FROM docker.m.our-intra.net/microsoft/dotnet:2.1.4-aspnetcore-runtime
COPY --from=0 /app/aspnetapp/MyProject.WebApi/out ./

FROM docker.m.our-intra.net/microsoft/dotnet:2.1-sdk AS build-stage
...
FROM docker.m.our-intra.net/microsoft/dotnet:2.1.4-aspnetcore-runtime
COPY --from=build-stage /app/aspnetapp/MyProject.WebApi/out ./

docker create --name build-stage-container build-stage-image
docker cp build-stage-container:/app/aspnetapp/MyProject.WebApi/out .

podTemplate(
    ...,
    containers: ['microsoft/dotnet:2.1-sdk', 'docker:1.13.1'],
    ...
) {
    container('microsoft/dotnet:2.1-sdk') {
        stage("Compile Code") {
            sh "dotnet restore"
            sh "dotnet publish -c Release -o out"
        }
    }
    container('docker:1.13.1') {
        stage("Build Docker image") {
            docker.build("mydockerimage:1.0")
        }
    }
}