Add example

.dockerignore

@@ -1,2 +1,2 @@
-examples
+example
 .github

README.md

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-# gatus (in progress)
+# gatus
+
+[![Docker pulls](https://img.shields.io/docker/pulls/twinproduction/gatus.svg)](https://cloud.docker.com/repository/docker/twinproduction/gatus)
 
 A service health dashboard in Go that is meant to be used as a docker 
 image with a custom configuration file.

example/Dockerfile

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+FROM twinproduction/gatus
+ADD config.yaml ./

example/config.yaml

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+services:
+  - name: example
+    url: http://example.org
+    interval: 30s
+    failure-threshold: 3
+    conditions:
+      - "$STATUS == 200"