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Okay.

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We have just added the favicon icons into our project and now we in browser see actually that those

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icons are added and we are able to see them here in the head section of the document.

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Now let me demonstrate you how we are able to get rid of this absolute path here in volume mapping and

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use variable instead.

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Why is that important?

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Answer is simple.

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If you will take this command and try to execute it on your computer, you'll definitely will fail because

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there is no such path on your computer.

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But with variable, you will be able to run this command on any of the computers.

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Okay, let me terminate this container control C Docker.

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PS There are no containers currently running and now remember that we have used command PWD in order

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to find out path to current folder.

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And now let me show you how you are able to use the command in order to automatically insert absolute

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path into the command that will create new container.

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Let's use same container docker run and same port as before.

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External port 8081.

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Internal port 80.

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And next comes volume mapping.

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And here, instead of absolute path on your local computer, we will use variable in following way dollar

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sign P.w.d..

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That's it.

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Next comes colon and again internal folder.

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Same as we have used for nginx server before.

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It is user share nginx.

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HTML.

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And next comes name of the image we want to create container from.

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And image is the same.

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Nginx.

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Great recap that we are now located still in nginx folder that has index.html file and all remaining

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favicon files.

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It is important.

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Let's press enter and now container should be running.

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Let's go back to web browser refresh page here.

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Actually let me use here localhost instead of my IP address because in your case IP address will be

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different, but localhost is the same everywhere.

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And let's refresh page recap that we have used same port as before in previous lectures.

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Let's press enter.

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And I see.

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Same result.

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Hello from the web page with fancy favicon.

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And actually, in order to verify that we serve correct content and it is not served from the cache.

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Let me modify this text.

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Hello from the let's say nginx server like so save the file, go back to Chrome refresh page and yes

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I see updated page and that means that this command works correctly.

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We have used here variable as dollar sign d.

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That's how it works and how you are able to insert automatically results of specific command basically

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under the hood.

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This computer executes command and inserts result basically result is here into this command.

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But if I'll move to another folder, this path will be different.

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And let me quickly actually show you that let me terminate this container and let me go one level up

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to Containers folder, and if I'll enter here, you'll see this path.

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Let me clear terminal and let's rerun the same command as before with dollar sign wd enter.

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Go to Google Chrome refresh page and see this page forbidden.

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And that means that something is wrong and there is actually no index.html file inside of that folder

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that is now mapped to internal folder in nginx server.

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Actually you are able to set it in the following way that in such cases web server will serve default

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web page.

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But now you see simply error forbidden.

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That is important because now you understand that you need to go first to folder that has index.html

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file and all remaining files and only there.

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Run this command.

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Great.

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Let me terminate this container.

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And now you know how to use variables in such commands as Docker run.

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Also let me demonstrate you how you are able to run container in background.

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But let's do that next.

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Bye bye.