add readme

README.md

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+# Fedora Modularity Docs
+
+Please report Issues and submit Pull Requests for **Content Fixes** here.
+Never done a pull request (or "PR")? Here's the [Pagure documentation for
+Pull Requests](https://docs.pagure.org/pagure/usage/pull_requests.html).
+
+
+General appearance issues and publishing issues should be reported against
+the [publishing software](https://pagure.io/fedora-docs/docs-fp-o).
+
+## How to edit these documents
+
+All of this is written in AsciiDoc. It's a simple mostly-plain-text
+markup language. You may want to look at:
+
+
+* [AsciiDoc Syntax Quick Reference](http://asciidoctor.org/docs/asciidoc-syntax-quick-reference/)
+* [AsciiDoc Writer’s  Guide](http://asciidoctor.org/docs/asciidoc-writers-guide/)
+* [Antora Documentation](https://docs.antora.org/antora/1.0/page/)
+
+
+## Local preview
+
+This repo includes scripts to build and preview the contents of this repository.
+
+**NOTE**: Please note that if you reference pages from other repositoreis, such links will be broken in this local preview as it only builds this repository. If you want to rebuild the whole Fedora Docs site, please see [the Fedora Docs build repository](https://pagure.io/fedora-docs/docs-fp-o/) for instructions.
+
+Both scripts use docker, so please make sure you have it installed on your system. Please see below for instructions.
+
+To build and preview the site, run:
+
+```
+$ ./build.sh && ./preview.sh
+```
+
+The result will be available at http://localhost:8080
+
+### Installing docker on Fedora
+
+```
+$ sudo dnf install docker
+$ sudo systemctl start docker && sudo systemctl enable docker
+```