run dignostic steps on failure

.drone.yml

@@ -38,6 +38,23 @@ steps:
       - hugo version
       - hugo --gc=true --minify
 
+  # perform basic checks on failure
+  - name: diagnostics
+    image: plugins/drone-diagnostics
+    pull: if-not-exists
+    commands:
+      - env
+      - ls -lah
+      - ping git.dotya.ml -w 5
+      - ping www.github.com -w 5
+      - traceroute -T -p 443 git.dotya.ml
+      - traceroute -T -p 443 www.github.com
+      - dig dotya.ml
+      - echo "end of test"
+    when:
+      status:
+        - failure
+
 ---
 kind: pipeline
 type: docker
@@ -136,6 +153,23 @@ steps:
       branch: master
       status: success
 
+  # perform basic checks on failure
+  - name: diagnostics
+    image: plugins/drone-diagnostics
+    pull: if-not-exists
+    commands:
+      - env
+      - ls -lah
+      - ping git.dotya.ml -w 5
+      - ping www.github.com -w 5
+      - traceroute -T -p 443 git.dotya.ml
+      - traceroute -T -p 443 www.github.com
+      - dig dotya.ml
+      - echo "end of test"
+    when:
+      status:
+        - failure
+
 volumes:
   - name: s
     host: