Added CONTRIBUTING.md

CONTRIBUTING.md

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+# Contributing
+
+When contributing to this repository, please first discuss the change you wish to make via issue, email, or any other 
+method with the owner of this repository before making a change. 
+
+Please note we have a code of conduct, please follow it in all your interactions with the project.
+
+## Pull Request Process
+
+1. Ensure any install or build dependencies are removed before the end of the layer when doing a build.
+2. Ensure that your changes comply with the project's coding guidelines and that it's sufficiently documented. 
+3. Update the README.md with details of changes to the interface, this includes new environment variables, exposed 
+   ports, useful file locations and container parameters.
+4. Target the develop branch for your Pull Requests as this is were new changes are introduced. 
+4. After being successfully reviewed pull requests will be merged to develop branch and will finally be included in an 
+   upcoming release. 
+
+## Code of Conduct
+
+### Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making 
+participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, 
+disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, 
+religion, or sexual identity and orientation.
+
+### Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language.
+* Being respectful of differing viewpoints and experiences.
+* Gracefully accepting constructive criticism.
+* Focusing on what is best for the community.
+* Showing empathy towards other community members.
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances.
+* Trolling, insulting/derogatory comments, and personal or political attacks.
+* Public or private harassment.
+* Publishing others' private information, such as a physical or electronic address, without explicit permission.
+* Other conduct which could reasonably be considered inappropriate in a professional setting.
+
+### Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take 
+appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, 
+issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any 
+contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+### Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the 
+project or its community. Examples of representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed representative at an online or offline 
+event. Representation of a project may be further defined and clarified by project maintainers.
+
+### Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project owner at 
+[alextselegidis@gmail.com](alextselegidis@gmail.com). All complaints will be reviewed and investigated and will result 
+in a response that is deemed necessary and appropriate to the circumstances. The project owner is obligated to maintain 
+confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be 
+posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent 
+repercussions as determined by other members of the project's leadership.
+
+### Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](http://contributor-covenant.org), version 1.4, 
+available at http://contributor-covenant.org/version/1/4.