# From code to production

It starts with the code...

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Which gets deployed inside/on:

- An appliance
- A host
- A container

Or is reused as an module.

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## A (random) app step by step: worker.py

Let's explore what happens to an app (written by Jerome Petazzo) which will run inside a container.
The source code can be found here: [worker.py](https://github.com/jpetazzo/container.training/blob/main/dockercoins/worker/worker.py)

We'll see that the number of CVE's will increase as the code moves on during the build process from app to container image.

We will not focus on the application logic, only on the safety.

We want to assure our customers/users/ops collegues that the code does not contain any critical CVE's.

How can we do this?

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## How is this done in the food industry?

Let's first look at how the food industry is doing this.