First part of the contribution-guidlines

.github/CONTRIBUTING.md

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+# How to contribute
+
+You want help me make BlueMap better? Awesome!<br>
+Here you learn how it works and what you need to know before contributing.
+
+>**Please read this before creating an Issue or a PullRequest!** Issues/PR's that don't follow these instructions will be closed!<br>
+>**Issues are NOT for asking questions!** If you have a question, please use our [Discord](https://discord.gg/zmkyJa3) or [Reddit](https://www.reddit.com/r/BlueMap/)!
+
+### Table of Contents
+- [Reporting a Bug](#reporting-a-bug)
+- [Suggesting a new feature or change](#suggesting-a-new-feature-or-change)
+- [Creating a Pull-Request](#creating-a-pull-request)
+
+## Reporting a Bug
+The first thing you need to do, is to make sure what you found is actually a bug:<br>
+- A bug is an unintended behaviour of an implemented feature.
+BlueMap is not "done", there are quite a lot of features missing!
+So, if something doesn't work because it is not implemented yet, its not a bug.
+If you are not sure, you can briefly ask about it in our [Discord](https://discord.gg/zmkyJa3) before creating an Issue. :)
+- Make sure you tested it well enough to be sure it's not an issue on your end. If something doesn't work for you but for everyone else, its probably **not** a bug!
+
+Also, please make sure noone else has already reported the same or a very similar bug!
+If you have additional information for an existing bug-report, you can add a comment to the already existing Issue :)
+
+To report your bug, please open a [new Issue](https://github.com/BlueMap-Minecraft/BlueMap/issues/new?template=bug_report.md) with the `Bug report`-template and follow these guidlines:
+
+### Guidlines for a good Bug-Issue
+**A short, informative Title**<br>
+Your Issue should have a short but informative title, which makes it possible to distinquish it from- and easily recognize it in-between- other Issues.
+If someone else finds the same bug, they should be able to find your Issue only based on the title!
+
+**A detailed description**<br>
+Describe your bug in as much detail as possible:
+- What did you do before it happened? (How can the bug be reproduced?)
+- What did you expect to happen?
+- What happened instead?
+- CONTEXT!!
+  - The exact BlueMap-Version (e.g. the name of the used .jar file)
+  - The used os and platform (Windows/Linux, Spigot/Paper/Forge/Fabric/Sponge)
+  - Has the world been generated using any minecraft-mods?
+  - etc..
+- Is there a log- or a config-file that might help? Include it.
+- Maybe add a screenshot or video for illustration.
+
+**Well formatted and structured**<br>
+Make sure your Issue is easy to read and not a mess:
+- Use paragraphs to structure your issue.
+- Use [Markdown](https://guides.github.com/features/mastering-markdown/) to add headings and formatting.
+- Use codeblocks for log-snippets.
+- Upload full logs as file-attachments or use a paste-site like [GitHub Gists](https://gist.github.com/) or [Pastebin](https://pastebin.com/).
+
+**One Issue, one bug**<br>
+Create a separate Issue for each bug you find! Issues that contain more than one bug will be closed!
+
+## Suggesting a new feature or change
+**(Todo)**
+
+## Creating a Pull-Request
+**(Todo)**