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The DfE technical guidance and its content is intended for internal use by the DfE community.

Docker Desktop

the Folowwing information has been put together using;

  • Edition Windows 11 Enterprise Version 22H2 Installed on ‎13/‎03/‎2023 OS build 22621.2283 Experience Windows Feature Experience Pack 1000.22662.1000.0

  • all instruction are for use with DFE laptops with developer settings

  • all images are built using standard docker tooling

  • development IDE is visual studio code

  • visual studio code has docker extension installed

  • development code is running nodejs

  • development code is using npm as its package manager

Installing Docker

You will need access to docker-users group on the system user groups of your machine in order to run docker and possibly an update to the wsl kernal (achieve this by requesting a meeting with system administrator who will be able to screen share and run the update for you)

Requests should be made through the service portal

Use User Access to restricted Groups

  • RequestedFor should be pre filled with your name

  • RequestedTo should be pre filled with your name, ‘If you are doing this for another member of staff you can now change to there name

  • In do you want to add or remove access drop down select 'Add Access’

  • In Which Group(s) would you like to add the user to type ‘docker-users’

  • In Is there any other information you would like to provide? type ‘required to run Docker Desktop to complete daily software engineering tasks’

  • Now submit your request

and for the driver installation you should

Use Install device driver on my device

  • RequestedFor should be pre filled with your name, ‘If you are doing this for another member of staff you can now change to there name

  • Contect Number Usually phone number that you can be reached on

  • In Options for device drop down select 'Other’

  • In Laptop/Tablet Asset Number add you laptop number “this can be found in windows by going to ‘control panel > system > device name’”

  • In Please confirm the type of Device, including Make and Model enter the make and model information from systems about

  • In Please explain the reason why you need the driver installing type “required to run Docker Desktop to complete daily software engineering tasks”

  • Now submit your request

All will need to be raised by your Delivery Manager or Team Lead. Once complete it will appear in your software centre for you to install. For more information go here install docker on windows

Operating Desktop-Docker

Once installed start the application by clicking on the desktop icon added during installation.

Build An Image

To get started, follow the steps below:

  • Navigate to the Visual Studio code

  • Click on Terminal, this is found in the main menu at the top of the visual studio code IDE

  • Make sure you have Docker Desktop running

  • Ensure your cursor is in the terminal window at the end of the current directory

  • Use command line to navigate to your local source repo ‘CD’

  • Create a new folder ‘mkdir’ new it the project name

  • Navigate to the newly created folder

  • Now in the ternimal window and the root of the folder type ‘code .’ this will open a new VSC IDE in the current project folder

  • type in the terminal window ‘npm init -y’ this will build a simple project structure

  • once complete type in the terminal ‘npm install express’

  • Create a file called index.js and add it to the root directory

  • Open index.js in the editor and add this line to the top of the file


const express = require('express');

  • Now below that add

const app = express();

  • and on the next line add

app.use(express.json());

  • Add to the next line

const PORT = process.env.PORT || 3000;

  • Now and add
app.listen(PORT, () => {
  console.log("Server Listening on PORT:", PORT);
});
  • Now you need to define a route in your project for this we will add a status to return running add the following to the index.js
app.get("/status", (request, response) => {
   const status = {
      "Status": "Running"
   };

   response.send(status);
});
  • Open package.json file and add to the script section of the file
 "start": "node index.js" 

making sure to add a comma to the end of the line above

  • now in the terminal window type ‘npm start’

  • you should see a project start command a node command and server listening on the port number 3000

  • to close the server with the cursor in the terminal window select ‘CTRL + C’ and select ‘Y’

  • Once successfully set up you are ready to add docker

  • Select ‘View’ from the top menu of yyou visual studio code IDE

  • Click command Pallet

  • In the command pallet at the > type Docker a list will appear select ‘Add Docker Compose Files To Workspace’

  • next select application platform ‘NODEJS’

  • Next select the script that hold your start command ‘package.json’ file

  • Next select the port default is 3000

  • VSC will then prompt you to add a docker file select yes

  • VSC has now added all the files necessary to run your project in docker by issuing commands to your compose file

  • To test this select one of the compose files right click and select ‘Compose Up’

  • VSC will now build your image and your container and start it running which can be seen in the terminal window

  • Once started you can go back to your browser and enter ‘http://localhost:3000/status’ the browser should return { "Status": "Running" }

  • For more information on docker and compose goto: How to use docker and compose

  • For more information on docker extension in Vsc goto: Overview of contaoners in VSC

  • For more information on docker and node starter kit in vsc goto: Quick node starter page