Merge pull request #9 from Nullify-Platform/feat/install_docs

[draft] feat: clearer installation instructions

Author: kevinydzhu

INSTALL.md

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+# Installing the Nullify Grafana Plugin
+
+The Nullify Grafana Plugin allows customers of Nullify to visualize their Nullify scan results and trends in Grafana.
+
+Note: This plugin can only be installed on local/on-prem instances on Grafana. Grafana Cloud is NOT currently supported.
+
+To install this plugin:
+1. Install the plugin into your server instance following these instructions: https://grafana.com/docs/grafana/latest/administration/plugin-management/#install-plugin-on-local-grafana
+2. Add a new Nullify data source. Instructions on adding a data source: https://grafana.com/docs/grafana/latest/administration/data-source-management/
+3. Follow instructions on the Nullify API Settings page to setup your Nullify API integration.
+4. Import the attached dashboard JSON configuration to get started visualizing your Nullify data. Instructions on importing dashboards: https://grafana.com/docs/grafana/latest/dashboards/build-dashboards/import-dashboards/
+
+For any questions, feel free to reach out on Slack.
+
+Thanks for integrating with Nullify.