[nextcloud] add probes && switch to alpine

apps/nextcloud/templates/deployment.yaml

@@ -81,10 +81,43 @@ spec:
               mountPath: "/etc/letsencrypt"
             - name: nextcloud-data
               mountPath: "/var/www/html"
+          # Is it ready to work?
+          readinessProbe:
+            tcpSocket:
+              port: 443
+            initialDelaySeconds: 5
+            periodSeconds: 10
+          # Is it still working?
+          livenessProbe:
+            tcpSocket:
+              port: 443
+            initialDelaySeconds: 15
+            periodSeconds: 20
         - name: nextcloud
-          image: nextcloud:{{ .Chart.AppVersion }}-fpm
+          image: nextcloud:{{ .Chart.AppVersion }}-fpm-alpine
+          # Wait for 10 minutes to get ready
+          startupProbe:
+            httpGet:
+              path: /ocs/v2.php/apps/serverinfo/api/v1/info
+              port: fpm
+            failureThreshold: 20
+            periodSeconds: 30
+          # Dead if failing for 1 minute
+          livenessProbe:
+            httpGet:
+              path: /ocs/v2.php/apps/serverinfo/api/v1/info
+              port: fpm
+            failureThreshold: 6
+            periodSeconds: 10
+          readinessProbe:
+            httpGet:
+              path: /ocs/v2.php/apps/serverinfo/api/v1/info
+              port: fpm
+            failureThreshold: 3
+            periodSeconds: 30
           ports:
             - containerPort: 9000
+              name: fpm
           env:
             - name: POSTGRES_DB
               valueFrom: