add README

Author: abhishekrai43

README.md

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+Valido — PDF automation tool (website)
+
+This repository contains the static website for Valido (https://valido-app.github.io/).
+
+Quick notes
+- The installer/zip for the app is published in GitHub Releases (see tag v1.0.5):
+  https://github.com/Valido-App/valido-app.github.io/releases/tag/v1.0.5
+- To download the app from the site, use the release asset linked from that release.
+
+
+
+License & contact
+- Licensed by Valido (project owner).
+- For issues or feedback, open an issue on the repository's GitHub.
+
+