Init contributing guide

.gitpod.yml

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+# This configuration file was automatically generated by Gitpod.
+# Please adjust to your needs (see https://www.gitpod.io/docs/config-gitpod-file)
+# and commit this file to your remote git repository to share the goodness with others.
+
+tasks:
+  - init: ./gradlew clean build
+    command: ./gradlew clean build
+
+vscode:
+  extensions:
+    - "vscjava.vscode-java-dependency"
+    - "vscjava.vscode-java-debug"

CONTRIBUTING.md

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+# Contributing guide
+
+We try to make it easy, and all contributions, even the smaller ones, are more than welcome.
+This includes bug reports, fixes, documentation, examples...
+
+## Reporting an issue
+
+This project uses GitHub issues to manage the issues. Open an issue directly in GitHub.
+
+If you believe you found a bug, and it's likely possible, please indicate a way to reproduce it, what you are seeing and what you would expect to see.
+
+## Building the project locally
+
+Just do the following:
+
+```
+[email protected]:CycloneDX/cyclonedx-gradle-plugin.git
+cd cyclonedx-gradle-plugin
+./gradlew publishToMavenLocal
+```
+
+This will build and publish the new plugin version locally