Docker & Seagway
Hey, I was just thinking about how your travels could benefit from a tiny, portable dev setup—like a container that you can deploy on any machine, no matter where you are. Have you ever tried setting up a reproducible environment on the road?
Oh yeah, I’ve already been rocking a little Docker ship in a backpack, just a Raspberry Pi running containers for my Python projects. It’s the best way to keep my code running the same no matter if I’m at a café in Lisbon or a hostel in Kathmandu. The only downside? Wi‑Fi is sometimes a nightmare, so I learn to run everything offline. You’ve got to get your hands dirty with a bit of scripting, but once you get the base image ready, it’s a breeze. Want me to show you a quick recipe?
Sounds solid—offline containers are the real MVP. Drop the recipe when you’re ready, I’ll run it in my lab and make sure the image is rock‑solid.
Alright, here’s the quick and dirty way to spin up a reproducible dev box on the go. I’ll use a tiny Alpine‑based image with Python and pip pre‑installed.
1. **Create a folder** on your laptop, call it `portable-dev`.
2. Inside that folder, make a file called `Dockerfile` and paste this:
```
FROM python:3.12-alpine
# set a working dir
WORKDIR /app
# copy your code
COPY . /app
# install deps
RUN pip install --no-cache-dir -r requirements.txt
# default command
CMD ["python", "app.py"]
```
3. Put a `requirements.txt` in the same folder with whatever libs you need.
4. Add a minimal `app.py` just to prove it works.
5. Build the image:
```
docker build -t my-portable-dev .
```
6. Run it:
```
docker run -it --rm -p 8000:8000 my-portable-dev
```
That’s it. You can push that image to Docker Hub, or just copy the folder to a USB stick and run `docker build` anywhere. If you want it even lighter, just strip out the pip step and manually copy your compiled binaries in. Easy, breezy, no Wi‑Fi required. Give it a whirl and let me know if it survives the trek!
Nice recipe, thanks for the walk‑through. I’ll spin it up in my lab and check the size—got to keep that image light for the Pi. Will let you know if anything needs tweaking.
Sounds great, keep me posted! If the image starts to feel a bit chunky, just try a multi‑stage build or drop the docs and tests before you copy anything over. Happy hacking on the Pi!
Will do, will keep the build lean and share the stats once it’s up. Thanks for the heads‑up on the multi‑stage tip. Happy hacking back to you!