doc: add initial version of values and prios doc

VALUES_AND_PRIORITIZAION.md

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+# Values and Priorities
+
+> Document Status: Proposal, Work In Progress
+
+## Context
+
+Prioritize the **Technical** values shared by the project and use these to guide us when making tradeoffs.
+
+
+## Values and priority level
+
+This is only a subset of the overall priorities, listing only those which are at the
+top of the priority list. Anything on this list is very important for the project
+despite the relative priorities shown.
+
+- Priority 1 - Developer experience
+- Priority 2 - Stability
+- Priority 3 - Operational qualities
+- Priority 4 - Node.js maintainer experience
+- Priority 5 - Technology and API currency
+
+## Value descriptions
+
+### Developer Experience
+We value ensuring that developers are productive and enjoy developing with Node.js. Some key elements of this include:
+- Approachability (both technical and community)
+- Great Documentation 
+- Bundling friction-reducing APIs and components, even though they could be provided externally
+- Enabling/supporting external packages to ensure overall developer experience
+
+### Stability
+To avoid introducing churn into Node.js' ecosystem, we value stability and consistency across releases and avoid breaking changes. Some key elements of this include:
+- Backwards compatibility
+- Predictable and stable releases
+- A strong safety net, including explicitly testing how changes in Node.js affect userland packages.
+- Careful consideration of what goes into LTS releases 
+
+### Operational Qualities
+We value keeping Node.js safe, performant and lightweight as well as the ability to investigate and debug problems in development and production. Some key elements of this include:  
+- Throughput (speed)
+- Startup time
+- Binary size
+- Memory footprint
+- Debug tooling (debugger)
+- Diagnostic tooling (profilers, heapdumps, coredumps, etc.)
+- Addressing security vulnerabilities in a responsible manner
+
+### Node.js Maintainer Experience
+We value the productivity and happiness of Node.js' maintainers. Some key elements of this include:
+- Approachability of the codebase
+- Good internal documentation and guides
+- Low-friction policies and processes
+- Good CI and tooling to make maintainers productive
+
+### Providing modern APIs and Technologies
+We value providing developers with modern APIs and technologies following existing standards whenever possible. Some key elements of this include:
+- Participating in standards work and organizations
+- Web API compatibility
+- Supporting and exposing new technologies and standards through early adoption
+
+## References
+
+[First pass at list of values](https://github.com/nodejs/next-10/issues/5)
+[Original priorities brainstorm document](https://docs.google.com/document/d/1sbO_zCn9n_JH2zuGtqNAahUhA_mGFA89DdAme8nEdsw)