Publishing net core app on Heroku

You know that there are no much .Net hosting, so for testing porpuse is somethimes hard to find a way to preview your project.
This how to publish a .Net core app(also .Net applications, like mvc, etc) on Heroku

Requirements.

* an Account on Heroku(and download heroku-cli)
* A few knowledge of Docker(this is the approach to publish) download docker-tools for windows
* your .Net Core app(create a empty project .net core api if you don't have one)

Steps:

Create a Docker file at solution/project level:
content:

  
FROM microsoft/aspnetcore:2.0.5
WORKDIR /app
COPY . .
CMD ASPNETCORE_URLS=http://*:$PORT dotnet coolbox.sale.api.dll

Compile your project as Release

on cmd go to your publish folder(usually: bin/Release/netcoreapp2.0/publish)
execute this steps

1. Login on heroku
    heroku login

2. login in container
    heroku container:login

3. publish api or
    dotnet publish -c Release

4. Copy DOCKERFILE to publish directory
    ./bin/release/netcoreapp2.0/publish


    **In publish directory**


5. build docker image
    docker build -t coolboxsale-api .

6. tag the heroku target image
    docker tag coolboxsale-api registry.heroku.com/coolboxsale-api/web


7. push changes
    heroku container:push web --app coolboxsale-api

8. put online:
    heroku container:release web --app coolboxsale-api

and voila!:



For republish

Steps 5,7,8