Added README.md and some small changes

README.md

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+# DDNS
+
+_DDNS_ is a dynamic DNS helper for Digital Ocean users to utilize their DO account as a Dynamic DNS resolver.
+
+## Installation
+
+Copy the ```ddns.py``` file to e.g. ```/usr/local/bin``` folder and run ```chmod +x``` to make it executable. You can remove the .py filending if you wish.
+
+Run ```pip3 install -r requirements.txt``` to install all requirements the app needs.
+
+
+## Usage
+
+For instructions run ```bash
+ddns -h
+```
+
+The program is best suited to be executed with e.g cron or any other system that can run at intervals. To run the app every 6 hours with cron add the following line to your crontab
+
+```bash
+0 */6 * * *  /usr/local/bin/ddns
+```
+
+## Contributing
+
+Pull requests are welcome. For major changes, please open an issue first
+to discuss what you would like to change.
+
+## License
+
+MIT License
+
+Copyright (c) [2023] [Rune Olsen]
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+[MIT](https://choosealicense.com/licenses/mit/)