Shipping containers for your code
Day 2 of 149
👉 Full deep-dive with code examples
The Shipping Container Analogy
Before shipping containers, moving goods was a nightmare:
- Different trucks, ships, trains
- Everything had to be repacked
- Things broke, got lost
Then came standard shipping containers:
- Same size everywhere
- Moves from ship to truck to warehouse seamlessly
- Contents stay safe inside
Docker is a shipping container for code!
The Problem It Solves
"It works on my machine!" 🤷
Your code needs:
- Specific language version
- Certain libraries
- Special configurations
On your laptop: ✅ Works
On the server: ❌ Breaks
How Docker Fixes It
You package EVERYTHING into a container:
- Your code
- The language runtime
- All dependencies
- Configuration
┌─────────────────────┐
│ Docker Container │
│ ┌───────────────┐ │
│ │ Your Code │ │
│ ├───────────────┤ │
│ │ Python │ │
│ ├───────────────┤ │
│ │ Libraries │ │
│ └───────────────┘ │
└─────────────────────┘
Now it runs the same everywhere:
- Your laptop ✅
- Colleague's machine ✅
- Production server ✅
In One Sentence
Docker packages your app with everything it needs, so it runs identically anywhere.
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