popeye: add page (#3017)

pages/common/popeye.md

@@ -0,0 +1,20 @@
+# popeye
+
+> Utility that reports potential issues with Kubernetes deployment manifests.
+> Homepage: <https://github.com/derailed/popeye>.
+
+- Scan the current Kubernetes cluster:
+
+`popeye`
+
+- Scan a specific namespace:
+
+`popeye -n {{namespace}}`
+
+- Scan specific Kubernetes context:
+
+`popeye --context={{context}}`
+
+- Use a spinach configuration file for scanning:
+
+`popeye -f {{spinach.yaml}}`