Create a Docker file for a CMS app

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Note

This example assumes you already have an Optimizely Content Management System (CMS) ASP.NET Core-based application on your machine.

The project in this example is called episerversample). For more information, see Install a sample site.

If you are new to ASP.NET, you can follow a simple tutorial to initialize a project or clone our ASP.NET Docker Sample.

Create a Docker file for the app

1. Create a Dockerfile in your project folder.

2. Add the text below to your Dockerfile for either Linux or Windows Containers. The tags below are multi-arch, meaning they pull either Windows or Linux containers depending on what mode is set in Docker Desktop for Windows. Read more in switch containers.

3. The Dockerfile assumes that your application is called episerversample. Change the Dockerfile to use the DLL file of your project.

   Dockerfile

   FROM mcr.microsoft.com/dotnet/sdk:5.0-buster-slim AS build-env
   WORKDIR /app
   
   COPY \*.csproj ./  
   RUN dotnet restore
   
   COPY . ./  
   RUN dotnet publish -c Release -o out
   
   FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim  
   WORKDIR /app  
   COPY --from=build-env /app/out .
   
   EXPOSE 80
   
   ENTRYPOINT ["dotnet", "episerversample.dll"]   
   

4. To make your build context as small as possible, add a .dockerignore file to your project folder and copy the following into it.
   bin/`` obj/

Build and run the Docker image

1. Open a command prompt and go to your project folder.
2. Use the following commands to build and run your Docker image:

docker build -t episerversample . docker run -it -e "Urls=<http://+:80>" -p 8080:80 episerversample