feat(read_file): add subject for the new exercise

subjects/devops/read_file/README.md

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+## Read file
+
+### Instructions
+
+Create a file `read_file.py` which will have a function `get_recipes(file_name)` that takes a file as an argument.
+
+Create another file `recipes_data.json` and copy/paste on it the following content:
+
+```json
+[
+  {
+    "title": "Vegetable Lasagna",
+    "ingredients": [
+      "1 lb. lasagna noodles",
+      "1 onion, diced",
+      "2 cloves of garlic, minced",
+      "2 bell peppers, diced",
+      "1 zucchini, diced",
+      "1 eggplant, diced",
+      "1 (28 oz) can crushed tomatoes",
+      "1/4 cup chopped fresh basil",
+      "1/4 cup chopped fresh parsley",
+      "1/4 cup grated Parmesan cheese",
+      "1 cup ricotta cheese",
+      "2 cups shredded mozzarella cheese"
+    ],
+    "people": 6
+  },
+  {
+    "title": "Stir-Fried Shrimp with Vegetables",
+    "ingredients": [
+      "1 lb. large shrimp, peeled and deveined",
+      "2 tbsp. vegetable oil",
+      "1 red bell pepper, sliced",
+      "1 onion, sliced",
+      "1 cup sliced mushrooms",
+      "2 cloves of garlic, minced",
+      "1/4 cup soy sauce",
+      "1/4 cup hoisin sauce",
+      "2 tbsp. rice vinegar",
+      "1 tsp. sesame oil",
+      "1 tsp. sugar",
+      "1/4 tsp. red pepper flakes"
+    ],
+    "people": 4
+  },
+  {
+    "title": "Spicy Chicken Tacos",
+    "ingredients": [
+      "1 lb. boneless, skinless chicken breasts",
+      "1 tbsp. chili powder",
+      "1 tsp. cumin",
+      "1/2 tsp. paprika",
+      "1/4 tsp. salt",
+      "1/4 tsp. black pepper",
+      "1 tbsp. vegetable oil",
+      "8 small flour or corn tortillas",
+      "1 cup shredded lettuce",
+      "1/2 cup diced tomatoes",
+      "1/4 cup sour cream",
+      "1/4 cup chopped fresh cilantro"
+    ],
+    "people": 4
+  }
+]
+```
+
+You have to read the file `recipes_data.json` and load its content into a list of dictionaries.
+
+Expected output format:
+
+```python
+[{...}, {...}, {...}]
+```
+
+### Usage
+
+Here is a possible `test.py` to test your functions:
+
+```python
+import read_recipes
+
+if __name__ == '__main__':
+    print(read_recipes.get_recipes('recipes_data.json'))
+```
+
+```bash
+$ python test.py
+[{'title': 'Vegetable Lasagna', 'ingredients': ['1 lb. lasagna noodles', '1 onion, diced', '2 cloves of garlic, minced', '2 bell peppers, diced', '1 zucchini, diced', '1 eggplant, diced', '1 (28 oz) can crushed tomatoes', '1/4 cup chopped fresh basil', '1/4 cup chopped fresh parsley', '1/4 cup grated Parmesan cheese', '1 cup ricotta cheese', '2 cups shredded mozzarella cheese'], 'people': 6}, {'title': 'Stir-Fried Shrimp with Vegetables', 'ingredients': ['1 lb. large shrimp, peeled and deveined', '2 tbsp. vegetable oil', '1 red bell pepper, sliced', '1 onion, sliced', '1 cup sliced mushrooms', '2 cloves of garlic, minced', '1/4 cup soy sauce', '1/4 cup hoisin sauce', '2 tbsp. rice vinegar', '1 tsp. sesame oil', '1 tsp. sugar', '1/4 tsp. red pepper flakes'], 'people': 4}, {'title': 'Spicy Chicken Tacos', 'ingredients': ['1 lb. boneless, skinless chicken breasts', '1 tbsp. chili powder', '1 tsp. cumin', '1/2 tsp. paprika', '1/4 tsp. salt', '1/4 tsp. black pepper', '1 tbsp. vegetable oil', '8 small flour or corn tortillas', '1 cup shredded lettuce', '1/2 cup diced tomatoes', '1/4 cup sour cream', '1/4 cup chopped fresh cilantro'], 'people': 4}]
+```
+
+### References
+
+- [Python and json basics](https://www.w3schools.com/python/python_json.asp)