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DockerDeno: Containerize a Deno hello world server
Deno is the buzzword of the moment, and we still don't know how it will end.
Honestly, I am very fond of node, but I was intrigued, so I created a hello world server with deno, and immediately I tried to containerize it with docker.
Warning!
this example is based on this docker image https://hub.docker.com/r/hayd/deno
Which is not an official deno repository
Github Repository: https://github.com/FrancescoXX/deno-docker
Please note the this the first time I use deno, so it is something pretty new also to me
Short version
you can just clone the repository
git clone https://github.com/FrancescoXX/deno-docker
navigate to the folder where the docker-compose.yml is located, and run
docker-compose up --build
Done!
Long version
If you want to follow along, and you use Visual Studio Code, I suggest you install this extension:
First of all, we create a file for the deno dependencies, called deps.ts.
In Deno, we import third part code directly from urls, no node_modules or package.json is needed
export { serve } from "https://deno.land/[email protected]/http/server.ts";
Then, we create the main.ts file, and import the deps.ts file as a regular ts file
We also define a very simple Server, based on the official example
import { serve } from "./deps.ts";const PORT = 8000;const s = serve({ port: 8000 });const body = new TextEncoder().encode("Hello World\n");console.log(`Server started on port ${PORT}`);for await (const req of s) { req.respond({ body });}
then, we create a very simple Dockerfile, using the hayd/alpine-deno:1.0.0 image
FROM hayd/alpine-deno:1.0.0EXPOSE 8000WORKDIR /appUSER denoCOPY deps.ts .RUN deno cache deps.tsCOPY . .RUN deno cache main.tsCMD ["run", "--allow-net", "main.ts"]
And last, we create a very simple docker-compose.yml file, which is no needed for now, but it could be useful in the future, for example, if we start using a database or some other services
We define port 8000 as both inner and outer one and a default network
version: "3.7"services: deno: image: "deno-docker:0.0.1" build: . ports: - "8000:8000" networks: - denonetworks: deno: {}
from the folder where the docker-compose.yml file is located, we build the image:
docker-compose build
And finally, we can launch the service with this command
docker-compose up deno
visit localhost:8000 from a browser
That is not the best and most useful server, but it is intended as a point to start from
Also, using docker, we didn't need to install deno on the machine
Please leave a comment if you want more articles about this topic
Github Repository: Github Repository: https://github.com/FrancescoXX/deno-docker
Original Link: https://dev.to/francescoxx/docker-deno-containerize-a-deno-hello-world-server-1ha1
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