feat: add .gitignore, requirements and basic README

- added basic instructions on how to make the API key accessible to the
  scripts

.gitignore

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+.venv
+**/__pycache__
+apikey.yml

README.md

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+# Ionos DNS updates
+
+A set of scripts used to make dynamic DNS updates to the Ionos API.
+
+### Dependencies
+
+Python libraries:
+- [requests](https://pypi.org/project/requests/)
+- [pyyaml](https://pypi.org/project/PyYAML/)
+
+### Initial setup
+
+Install the [dependencies](#dependencies), preferrably using your system's package manager.
+
+Next, you will need your Ionos API keypair.
+Clone the repo and create a file called `apikey.yml` at the project root.
+Inside the file, paste your Ionos API-keypair in the following format:
+
+```yaml
+---
+
+apikey:
+  prefix: <your api key prefix>
+  secret: <your api key secret>
+
+...
+```

requirements.txt

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+certifi==2022.6.15
+charset-normalizer==2.1.1
+idna==3.3
+PyYAML==6.0
+requests==2.28.1
+urllib3==1.26.12