examples improvement - certbot cloudflare and wildcard, clamav, crowdsec, ghost and gogs

examples/clamav/README.md

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+# ClamAV plugin
+
+Automatically scan files with ClamAV when they are uploaded and deny the upload if the file is detected. See the [bunkerized-nginx-clamav](https://github.com/bunkerity/bunkerized-nginx-clamav) repository for more information.
+
+## Preamble
+
+This example uses a bunkerized-nginx plugin, you can have a look at the [documentation](https://bunkerized-nginx.readthedocs.io/en/latest/plugins.html) to get more information about plugins.
+
+## Architecture
+
+<img src="https://github.com/bunkerity/bunkerized-nginx/blob/dev/examples/clamav/architecture.png?raw=true" />
+
+## Configuration
+
+You will need to clone the bunkerized-nginx-clamav plugin and edit the **plugin.json** file.
+
+## Docker
+
+See [docker-compose.yml](https://github.com/bunkerity/bunkerized-nginx/blob/master/examples/clamav/docker-compose.yml).