Feat: add Docker setup and run week_004 tests successfully

Author: codebyfernanda

Dockerfile

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+# 1. Base Image Selection
+# Uses an official, lightweight, and minimal Python image based on Debian.
+# The "-slim" variant excludes unnecessary system packages, which drastically 
+# reduces the final image size and minimizes the security attack surface, making 
+# it ideal for CI/CD test automation pipelines.
+FROM python:3.12-slim
+
+# 2. Working Directory Definition
+# Creates and establishes "/app" as the absolute working directory inside the container.
+# All subsequent instructions (like COPY, RUN, and CMD) will be executed from this path.
+# This prevents cluttering the root directory of the container system.
+WORKDIR /app
+
+# 3. Dependencies Pre-copy (Cache Optimization)
+# Copies only the requirements file from the host machine to the current directory inside the container.
+# By isolating this step before copying the rest of the source code, we take advantage 
+# of Docker's layer caching mechanism. If requirements.txt hasn't changed, Docker skips 
+# the heavy installation step (Step 4) during future builds, saving valuable build time.
+COPY requirements.txt .
+
+# 4. QA Dependency Installation
+# Executes the pip installer to install all specified testing frameworks (such as pytest, requests, jsonschema).
+# The "--no-cache-dir" flag is a production best practice: it forces pip to delete downloaded 
+# .whl files and temporary installers immediately after installation, keeping the container image ultra-lean.
+RUN pip install --no-cache-dir -r requirements.txt
+
+# 5. Source Code Copying
+# Copies the entire content of your current local directory (test suites, conftest.py, schemas) 
+# into the container's working directory. 
+# Note: Ensure you have a .dockerignore file configured to prevent copying local artifacts 
+# like .venv/ or __pycache__ folders into this layer.
+COPY . .
+
+# 6. Default Container Command
+# Defines the primary instruction that will trigger automatically whenever the container is spun up.
+# Using the preferred JSON array syntax (exec form), it fires up the Pytest test runner in verbose mode (-v).
+# This default behavior can easily

requirements.txt

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+# ======= FILE CREATED BY FERNANDA BASTOS (@codebyfernanda) =======
+
+pytest==9.0.3
+pytest-schema==0.1.2
+jsonschema==4.26.0
+requests==2.34.2
+
+# =================================================================