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Node.js and Express Example

Here's a JavaScript example which creates a Node.js and Express app that has a Hello World endpoint and serves some static files.

What's what

app.js - contains the actual source code for the Hello World example.

main.html - contains a basic webpage that loads a static image

public/ - static resources (e.g. CSS, images, etc.)

package-lock.json - describes dependencies

Dockerfile - contains instructions for how to build the Docker image

Building the thing

To build the container, just do docker build -t hello-world-node . To verify we built the image and Docker can see it, lets do docker image ls

$ docker image ls

REPOSITORY                               TAG                 IMAGE ID            CREATED              SIZE
hello-world-node                         latest              0d40e98af4ac        26 seconds ago       923MB

Running the thing

Great! Now that you have a built image, let's make a container from it. We can do this by running our image and expose the port to our local machine. There is more explanation on docker run on the main README.md in this repository.

$ docker run -p 3000:3000 hello-world-node

Example running on localhost:3000

Then, you can go to your favourite browser and visit localhost:3000, you'll see a nice "Hello World!" from our container! Visit localhost:3000/doggo to see a webpage with a cute dog photo :)

Deploying on Google Cloud Run

Tagging the image

docker tag <local-image-name> gcr.io/<project-name>/<image-name>:<version>

Pushing the image

docker push gcr.io/<project-name>/<image-name>:<version>