Setting up the Angular Application
(You can skip this section if you already have an Angular app running.)
To build your Angular application, ensure you have both node and npm installed.
You can verify with the following commands:
npm --version. If
installed correctly these will both give you a number as an output.
Next, install the Angular CLI with
npm install -g @angular/cli;
After installed, go to a folder and run the following command
ng new webappio-angular-example. This will create a new Angular app in the
folder ‘webappio-angular-example’. When running this command, you’ll be prompted
to use Angular routing (we selected yes), and select a stylesheet (we selected
Once your app is finished installing, go into your directory with the command
cd webappio-angular-example, and run the command
ng serve -o --poll=2000.
This will open the angular application on your computer on your localhost. You
can now go in and change the title of the page or make another change to your
Angular application to see the changes in effect.
Summary of Steps:
npm install -g @angular/cli
ng new webappio-angular-example
ng serve -o --poll=2000
Listed below is an example Layerfile for webapp.io which you can use to setup a basic Angular application. We’ll breakdown this Layerfile in the section below for a set of detailed explanation on what each one of the instructions do.
# Set the image FROM vm/ubuntu:18.04 # Install nodejs and npm RUN curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash - RUN sudo apt-get install -y nodejs RUN sudo npm install npm@latest -g # Install angular RUN npm install -g @angular/cli # Get files from repository COPY . . # Install project dependencies RUN npm install # Run angular app RUN BACKGROUND ng serve --host 0.0.0.0 --disable-host-check # Show website on preview environment at port 4200 EXPOSE WEBSITE http://localhost:4200
Setting up the Layerfile
If you haven’t already, please sign up to webapp.io, and install webapp.io onto your repository.
First let’s breakdown each instruction in our Layerfile.
1: Set the Image
FROM instruction tells webapp.io what base to use to run tests from. There
can only be one
FROM line, and in this case we’re using the
virtual machine image.
If you’re familiar with AWS Ec2 Instances, this is similar to creating a virtual machine from the ubuntu 18.04 image.
2. Install NodeJS and NPM
RUN curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -
RUN sudo apt-get install -y nodejs
RUN sudo npm install npm@latest -g
RUN instruction will run the given script, and fails the Layerfile if the
script fails. In this case, we’re using the
RUN command to install the
dependencies we need to build and run the Angular application.
In this case we’re using the
RUN instruction to download Node JS and npm.
3. Install Angular
RUN npm install -g @angular/cli
Similar to the previous step, we use the
RUN command but this time we’re using
it to install Angular. This was the same step you ran when setting up Angular
4. Get Repository Files
COPY . .
COPY instruction moves files from your repository to the virtual machine.
The Layerfile will pick up on the files in the repository that you are making
the commit for, and will copy those files into the virtual machine so you can
run you project.
5. Install Dependencies
RUN npm install
Similar to the
RUN commands above, this will execute the given script
npm install, which will install the dependencies for the Angular app.
6. Start the Angular App
RUN BACKGROUND ng serve --host 0.0.0.0 --disable-host-check
RUN BACKGROUND instruction is the
RUN instruction with the
flag. This tells webapp.io to continue to the next step in the Layerfile instead
of waiting for the given script to run. The reason why we do this is that
ng serve will essentially block the terminal while the Angular app is running.
We want to continue to the next step so that’s why we use
RUN BACKGROUND here.
7. Expose Angular App on the Virtual Machine
EXPOSE WEBSITE http://localhost:4200
EXPOSE WEBSITE instruction creates a link to view the virtual machine at a
specific port. We use
EXPOSE WEBSITE to expose the virtual machine on port
4200 which is where the Angular application runs after running
ng serve. We
EXPOSE WEBSITE here so we can get a link to our Angular app to share with
stakeholders involved in our projects.
Adding the Layerfile
The last step in this process is to add the Layerfile to your repository. Simply
create a file called
Layerfile (no file extension) in the root of your Angular
application. If you haven’t already, install webapp.io onto your repository
containing your Angular app. Once done, simply create a commit and push your
Angular app to the repository with the new Layerfile. Webapp.io will pick up on
the Layerfile and build your Angular application according to the steps in your
Check out our Angular video tutorial before for a step-by-step breakdown on how to set up webapp.io with preview environments for an Angular application: