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--- a/README.md
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@@ -1,3 +1,13 @@
 # docker-healthcheck
 
-Healthchecks integration for docker containers
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+Healthchecks integration for docker containers
+
+Configuration is specified in "checks.yaml" in your working directory.
+The format of "checks.yaml" looks like the following:
+
+```
+self: "<ping url>"
+<docker container id or name 1>: "<ping url>"
+<docker container id or name 2>: "<ping url>"
+...
+```
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