Building a Web Server Docker File
In our example, we will use the Apache Web Server on Ubuntu to build our image. We should follow the steps given below, to build our web server Docker file.
Step 1 − The initial step is to build our Docker File. We should use vim and create a Docker File with the following data.
FROM ubuntu
RUN apt-get update
RUN apt-get install –y apache2
RUN apt-get install –y apache2-utils
RUN apt-get clean
EXPOSE 80 CMD [“apache2ctl”, “-D”, “FOREGROUND”]The following points should be noted about the above statements−
Now that the file details have been entered, simply save the file.
Step 2 − Run the Docker build command to build the Docker file. It tends to be finished using the following command −
sudo docker build –t=”mywebserver” . 
Step 3 − Now that the web server file has been built, it's now time to create a container from the image. We can do this with the Docker run command.
sudo docker run –d –p 80:80 mywebserver
The following points should be noted about the above command −
