Create CONTRIBUTING.md

Author: mr-mig

CONTRIBUTING.md

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+## The Goal
+Our goal is not to have the biggest list of stuff.  
+Our goal is to have a **comprehensible** list of most valuable things any programmer should know about.
+
+## Contributing
+
+You contributions to this repo is always welcome!   
+Bear in mind, that this repo is *highly opinionated* and *curated*.  
+Your opinion on value of any resource may not match the opinion of curator. 
+
+**No PR will be discarded without explanations!**
+
+
+## Core Values
+*Values are clickable*
+
+<details><summary>Less is more! :muscle:</summary><p>
+
+We :heart: simplicity.<br>
+We :heart: essential stuff.<br>
+This is why we strive to having less, but most valuable resources in the list.
+</p></details>
+
+<details><summary> We :heart: widely applicable knowledge/skills. </summary><p>
+
+The world is not static. Everything changes.<br>
+This is why we prioritize strategically valuable skills/knowledge.<br>
+This is why there are so many philosophical resources in that list.
+</p></details>
+
+<details><summary> We do not add to stress/hype level :zap: </summary><p>
+
+There are enough stress sources in everybody's lifes.<br>
+We strive to be helpful without adding to the stress and creating hype.<br>
+Most endless stream resources (forums, newsletters, blogs, communities) are noisy and create questionable value.<br>
+Be mindful of that fact when adding resources.
+</p></details>
+
+<details><summary>Technology is always about human beings :man: :woman: :baby:.</summary><p>
+
+We do not code in sake of coding. We code to solve other people's problems.<br>
+This is why resources on soft skills are an essential part of that list.
+</p></details>
+
+## Guidelines
+*Guidelines are clickable*
+
+<details><summary>Do not add things you <b>have not evaluated</b> personally!</summary><p>
+
+Use your critical thinking to filter out non-essential stuff.  
+Give honest arguments for why the resource should be included.  
+Have you read this book? 
+Can you give a short article? 
+</p></details>
+
+<details><summary>Use reasoning based on our values.</summary><p>
+
+Before adding any resource, answer this questions to yourself: 
+- Will it make every programmer a better human being? 
+- Will it change the quality of programmer's work? 
+- Will it change the quality of programmer's life? 
+- Would you personally recommend this resource to your friend, starting on software development career?
+
+</p></details>
+
+<details><summary><b>One item</b> per Pull Request.</summary><p>
+
+There may be a discussion related to an item you want to add.  
+Adding just a single item per pull request makes it much easier for everyone involved.
+</p></details>
+
+<details><summary>Do not open issues with resources, create a Pull Request instead!</summary><p>
+
+It is just easier to discuss and decide on a resource within a Pull Request.
+</p></details>
+
+<details><summary>Use consistent set of resource type emoji</summary><p>
+
+🎥 - Video/Talk  
+📖 - Book  
+📄 - Online article  
+📜 - Paper/Document  
+✅ - Checklist  
+
+</p></details>
+