Docker image: Low.js (lighweight Node.js) on Alpine Linux
This image is supposed to run JavaScript applications written for Low.js, which supports a subset of Node.js API with much less footprint. For example, Node.js 14.3.0 needs 120 MB and Low.js 1.5.1 needs 6 MB on the disk. The price is a limited API and a JavaScript engine without JIT (Duktape). This image is built automatically on the top of the tag latest from the Alpine repository, so that it is always based on the latest Alpine Linux. Low.js has to be updated from time to time by editing the Dockerfile and triggering a new build manually.
If you have trouble pulling the image from the Docker's default hub.docker.com, try gitlab.com, where this project is primarily maintained: registry.gitlab.com/prantlf/docker-lowjs.
docker pull prantlf/lowjs
You can either create your own image based on this one, or you can use it directly to run a JavaScript project. The Low.js binary /bin/low is the default entrypoint. The directory /root is the default working directory. Ports 80 and 443 are exposed by default.
For example, run a script from hello.js in the current directory:
docker run --rm -it -v "${PWD}":/root \
prantlf/lowjs hello.js
For example, start a web server using built-in networking modules from server.js in the current directory:
docker run --rm -it -v "${PWD}":/root -p 80:80 -p 443:443 \
prantlf/lowjs server.js
The local image is built as lowjs and pushed to the docker hub as prantlf/lowjs:latest.
# Remove an old local image:
make clean
# Check the `Dockerfile`:
make lint
# Build a new local image:
make build
# Enter an interactive shell inside the created image:
make run
# Tag the local image for pushing:
make tag
# Login to the docker hub:
make login
# Push the local image to the docker hub:
make push
Copyright (c) 2020-2021 Ferdinand Prantl
Licensed under the MIT license.