Include basic liveness & readiness probes

Include a HTTPS request to the root path (/) that returns a 200 OK and does not require a token to be requested.

patch from WhatsApp#48

Author: bmm-alc

installation/kubernetes/webapp.yaml

@@ -93,6 +93,20 @@ spec:
               key: wa-db-password
         - name: WA_WEB_SERVERNAME
           value: 'whatsapp-web-service'
+        livenessProbe:
+          httpGet:
+            path: /
+            port: web
+            scheme: HTTPS
+        initialDelaySeconds: 30
+        timeoutSeconds: 10
+        readinessProbe:
+          httpGet:
+            path: /
+            port: web
+            scheme: HTTPS
+        initialDelaySeconds: 30
+        timeoutSeconds: 10
         volumeMounts:
         - name: whatsapp-media
           mountPath: /usr/local/wamedia