[#69] YW: set proxy endpoint timeout with values file

Summary:
allow for specifying timeout

This will be needed to ensure platform isn't hit by an accidental DDOS by prometheus slamming the proxy endpoint for an unavailable node.

Test Plan: tested by using "helm template"

Reviewers: sanketh

Reviewed By: sanketh

Differential Revision: https://phabricator.dev.yugabyte.com/D11651

stable/yugaware/templates/configs.yaml

@@ -64,6 +64,7 @@ data:
       swamper.targetPath = /opt/yugabyte/prometheus/targets
       swamper.rulesPath = /opt/yugabyte/prometheus/rules
       security.enable_auth_for_proxy_metrics = {{ .Values.yugaware.enableProxyMetricsAuth }}
+      proxy_endpoint_timeout = {{ .Values.yugaware.proxyEndpointTimeoutMs }}
       multiTenant = {{ .Values.yugaware.multiTenant }}
       releases.path = "/opt/yugabyte/releases"
       docker.release = "/opt/yugabyte/release"

stable/yugaware/values.yaml

@@ -57,6 +57,7 @@ yugaware:
       cpu: 2
       memory: 4Gi
   enableProxyMetricsAuth: true
+  proxyEndpointTimeoutMs: 1 minute
   # enables features specific for cloud deployments
   cloud:
     enabled: false