Add my download manager app

[gudarzi]

Thanks for taking the time to suggest an addition to awesome-selfhosted!

To ensure your Pull Request is dealt with swiftly, please check the following (check the boxes [x]):

• Submit one item per pull request. This eases reviewing and speeds up inclusion.
• You have searched the repository for any relevant issues or PRs, including closed ones.
• Any software you are adding is not already listed at any of awesome-sysadmin, staticgen.com, staticsitegenerators.net, dbdb.io.
• The file you are adding is formatted as described in addition.md.
• Demo links should only be used for interactive demos, i.e. not video demonstrations. If login credentials are required to access the demo, please link to the credentials directly.
• Comments and unused optional fields have been removed.
• The file you are adding uses kebab-case file naming, for example my-awesome-software.yml.
• Values for platform are the main server-side requirements for the software. Don't include frameworks or specific dialects.
• Any software project you are adding to the list is actively maintained.
• Any software project you are adding was first released more than 4 months ago.
• Any software project you are adding has working installation instructions.
• You understand that your Pull Request will be merged ~1 week after approval, to allow for further comments if needed.

[Ki-er]

Hi, thanks for your contribution.

Currently, this project doesn't have any tagged releases. Our guidelines require that Any software project you are adding was first released more than 4 months ago. This count initiates only after a release has been created to ensure users need not rely on the latest development version to use the project.

We also recommend maintaining a simple changelog that will help users in tracking software changes, particularly those that are breaking changes or require configuration modifications.

Once a release has been created and the project has matured for at least 4 months, the project may be resubmitted to awesome-selfhosted.

Thanks for understanding, and good luck with this project.