feat: section about packaging the project

Author: honzajavorek

sources/academy/webscraping/scraping_basics_python/13_platform.md

@@ -29,9 +29,54 @@ That said, the main goal of this lesson is to show how deploying to **any platfo
 
 :::
 
+## Packaging the project
+
+Until now we've been adding dependencies to our project by only installing them by `pip` inside an activated virtual environment. If we were to send our code to a friend, they wouldn't know what they need to install before they can run the scraper without import errors. The same applies if we were to send our code to a cloud platform.
+
+In the root of the project, let's create a file called `requirements.txt`, with a single line consisting of a single word:
+
+```text title="requirements.txt"
+crawlee
+```
+
+Each line in the file represents a single dependency, but our program has just one. With `requirements.txt` in place, Apify can run `pip install -r requirements.txt` to download and install all dependencies of the project before starting our program.
+
+:::tip Packaging projects
+
+The [requirements file](https://pip.pypa.io/en/latest/user_guide/#requirements-files) is an obsolete approach to packaging a Python project, but it still works and it's the simplest, which is convenient for the purposes of this lesson.
+
+For any serious work the best and future-proof approach to packaging is to create the [`pyproject.toml`](https://packaging.python.org/en/latest/guides/writing-pyproject-toml/) configuration file. We recommend the official [Python Packaging User Guide](https://packaging.python.org/) for more info.
+
+:::
+
 ## Registering
 
-## Something
+As a second step, let's [create a new Apify account](https://console.apify.com/sign-up). The process includes several verifications that you're a human being and that your e-mail address is valid. While annoying, these are necessary measures to prevent abuse of the platform.
+
+Apify serves both as an infrastructure where to privately deploy and run own scrapers, and as a marketplace, where anyone can offer their ready scrapers to others for rent. We'll overcome our curiosity for now and leave exploring the Apify Store for later.
+
+## Getting access from the command line
+
+To control the platform from our machine and send the code of our program there, we'll need the Apify CLI. On macOS, we can install the CLI using [Homebrew](https://brew.sh), otherwise we'll first need [Node.js](https://nodejs.org/en/download).
+
+After following the [Apify CLI installation guide](https://docs.apify.com/cli/docs/installation), we'll verify that we installed the tool by printing its version:
+
+```text
+$ apify --version
+apify-cli/0.0.0 system-arch00 node-v0.0.0
+```
+
+Now let's connect the CLI with the platform using our account:
+
+```text
+$ apify login
+...
+Success: You are logged in to Apify as user1234!
+```
+
+## Creating an Actor
+
+...
 
 ## What's next