Add the assignment to implement a health check

[refs #114c1c04fcd7]
learndocker · May 5, 2018 · 99a0ff4 · 99a0ff4
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+## Implement health checks
+* Use an image for an application you are familiar with
+  * nginx
+  * ...
+* Implement a health check
+  * curl
+  * wget
+  * ...
+* You might have to extend the image to install the tools you need
+* Setup the check in a Compose file
+  * Verify it works
+* Use the HEALTHCHECK instruction
+  * Verify it works
+* Disable the health check in the Compose file