Admin: new page about docker yay!!

2026-07-01T18:03:32Z

new page about docker yay!!

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Docker keeps projects contained and bundles all python/node versions, dependencies, and OS libraries into one image! This is best for web apps, projects with databases, etc. If you're hosting a Discord/Slack bot or a simple script, you might want to consider using [[Using PM2|PM2]] or [[Systemd]] instead.

=== 1. Installation ===
Run this command to update and install docker and its dependencies on your container.

'''Debian'''<syntaxhighlight>
apt update
apt install ca-certificates curl gnupg -y

install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
chmod a+r /etc/apt/keyrings/docker.asc

echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian bookworm stable" | tee /etc/apt/sources.list.d/docker.list

apt update
apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
docker run hello-world
</syntaxhighlight>'''Ubuntu'''<syntaxhighlight>
apt update
apt install ca-certificates curl gnupg -y

install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
chmod a+r /etc/apt/keyrings/docker.asc

echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu noble stable" | tee /etc/apt/sources.list.d/docker.list

apt update
apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
docker run hello-world
</syntaxhighlight>If you see a "Hello from Docker!" message, you're good.

=== 2. Project Setup ===

Create a <code>docker-compose.yml</code> . You can use a dockerfile, but the docker compose file is simpler for beginners and scales more easily! Below is a template.
<code>services:
web:
image: <image> # base image for your language, see table below
container_name: myapp
restart: unless-stopped
working_dir: /app
volumes:
- .:/app
command: sh -c "<install command> && <run command>"
env_file:
- .env</code>
Swap <code><image></code> and <code><install command> && <run command></code> for your language:
{| class="wikitable"
!Language
!<code>image</code>
!<code>command</code>
|-
|Python
|<code>python:3.12-slim</code>
|<code>pip install -r requirements.txt && python3 app.py</code>
|-
|Node.js
|<code>node:20-slim</code>
|<code>npm install && node index.js</code>
|-
|Bun
|<code>oven/bun:slim</code>
|<code>bun install && bun run index.ts</code>
|-
|Go
|<code>golang:1.22-alpine</code>
|<code>go mod download && go run main.go</code>
|-
|Rust
|<code>rust:slim</code>
|<code>cargo build --release && ./target/release/app</code>
|}
If your language isn't listed, just search it up! Docker has hundreds of compatible images!

Then, setup your environment variables and secrets in the same directory as the <code>docker-compose.yml</code>, and add <code>.env</code> to <code>.gitignore</code> so you don't accidentally leak them to GitHub.

Finally, run your code!<syntaxhighlight>
docker compose up -d
</syntaxhighlight>Check to make sure it's running:<syntaxhighlight>
docker compose ps
</syntaxhighlight>When you edit your code, you can easily restart your docker container!<syntaxhighlight>
docker compose restart web

</syntaxhighlight>

=== 3. Helpful Commands ===
{| class="wikitable"
!Command
!What it does
|-
|<code>docker compose ps</code>
|List your project's containers
|-
|<code>docker compose logs -f <service></code>
|Live-tail a service's logs
|-
|<code>docker compose restart <service></code>
|Restart one service
|-
|<code>docker compose down</code>
|Stop everything
|-
|<code>docker exec -it <name> bash</code>
|Get a shell inside a running container
|-
|<code>docker system prune -af</code>
|Clean up unused images/cache
|}

Docker - Revision history

Admin: new page about docker yay!!