Allow override kubernetes probes (#117)

- Allow overriding liveness and readiness probe
- Add optional startup probe

closes #118

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/117
Reviewed-by: luhahn <luhahn@noreply.gitea.io>
Reviewed-by: lafriks <lafriks@noreply.gitea.io>
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Co-committed-by: Michael Kriese <michael.kriese@visualon.de>

values.yaml

@@ -169,6 +169,52 @@ gitea:
     builtIn:
       enabled: true
 
+  livenessProbe:
+    enabled: true
+    initialDelaySeconds: 200
+    timeoutSeconds: 1
+    periodSeconds: 10
+    successThreshold: 1
+    failureThreshold: 10
+  readinessProbe:
+    enabled: true
+    initialDelaySeconds: 5
+    timeoutSeconds: 1
+    periodSeconds: 10
+    successThreshold: 1
+    failureThreshold: 3
+  startupProbe:
+    enabled: false
+    initialDelaySeconds: 60
+    periodSeconds: 10
+    successThreshold: 1
+    failureThreshold: 10
+
+  # customLivenessProbe:
+  #   httpGet:
+  #     path: /user/login
+  #     port: http
+  #   initialDelaySeconds: 60
+  #   periodSeconds: 10
+  #   successThreshold: 1
+  #   failureThreshold: 10
+  # customReadinessProbe:
+  #   httpGet:
+  #     path: /user/login
+  #     port: http
+  #   initialDelaySeconds: 5
+  #   periodSeconds: 10
+  #   successThreshold: 1
+  #   failureThreshold: 3
+  # customStartupProbe:
+  #   httpGet:
+  #     path: /user/login
+  #     port: http
+  #   initialDelaySeconds: 60
+  #   periodSeconds: 10
+  #   successThreshold: 1
+  #   failureThreshold: 10
+
 memcached:
   service:
     port: 11211