docs: Copy examples to docs include folder (#13728)

Signed-off-by: Ryan Northey <ryan@synca.io>

Author: phlax

docs/build.sh

@@ -142,6 +142,13 @@ cp -f "${API_DIR}"/xds_protocol.rst "${GENERATED_RST_DIR}/api-docs/xds_protocol.
 mkdir -p "${GENERATED_RST_DIR}"/configuration/best_practices
 cp -f "${CONFIGS_DIR}"/google-vrp/envoy-edge.yaml "${GENERATED_RST_DIR}"/configuration/best_practices
 
+copy_example_configs () {
+    mkdir -p "${GENERATED_RST_DIR}/start/sandboxes/_include"
+    cp -a "${SRC_DIR}"/examples/* "${GENERATED_RST_DIR}/start/sandboxes/_include"
+}
+
+copy_example_configs
+
 rsync -rav  "${API_DIR}/diagrams" "${GENERATED_RST_DIR}/api-docs"
 
 rsync -av \