Initial scaffold: Researcher Endorsement frontend

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/skills/docker-provisioner/SKILL.md

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+---
+name: docker-provisioner
+description: "Generates a multi-stage Dockerfile for production builds of the Vite + React app and provides guidance for Docker Compose/CI."
+license: MIT
+triggers:
+  - "generate dockerfile"
+  - "dockerize frontend"
+---
+
+# Docker Provisioner
+
+When to use this skill
+
+- Use when packaging the frontend for production or preparing a devcontainer/Codespaces image.
+- Triggered by commands to create or update a `Dockerfile` and `docker-compose.yml` for static serving.
+
+Instructions
+
+1. First Step: Generate a multi-stage `Dockerfile` that builds the app in a Node builder stage and serves the `dist` via `nginx` or a minimal static server.
+
+2. Second Step: Optionally create `docker-compose.yml` for local runs and include build args to pass environment variables.
+
+3. Third Step: Add CI steps to build and optionally push Docker images to GHCR or Docker Hub with secrets managed in the repository settings.
+
+Examples
+
+- Multi-stage Dockerfile snippet provided and notes about caching `node_modules` layers.
+
+Notes
+
+- Document how to set `VITE_` prefixed env vars at build time and how to use `npm run preview` for local tests.