fix(helm): change how the configMap for the gateway is generated

production/helm/loki/CHANGELOG.md

@@ -14,6 +14,7 @@ Entries should include a reference to the pull request that introduced the chang
 [//]: # (<AUTOMATED_UPDATES_LOCATOR> : do not remove this line. This locator is used by the CI pipeline to automatically create a changelog entry for each new Loki release. Add other chart versions and respective changelog entries bellow this line.)
 
 - [ENHANCEMENT] Expose Topology Spread Constraints in Helm chart templates and default values.
+- [BUGFIX] Fix Helm chart for gateway to be able to use custom file configuration without first line being a comment. https://github.com/grafana/loki/pull/14575
 
 ## 6.19.0
 

production/helm/loki/templates/gateway/configmap-gateway.yaml

@@ -8,5 +8,5 @@ metadata:
     {{- include "loki.gatewayLabels" . | nindent 4 }}
 data:
   nginx.conf: |
-    {{- tpl .Values.gateway.nginxConfig.file . | indent 2 }}
+    {{- tpl .Values.gateway.nginxConfig.file . | nindent 4 }}
 {{- end }}

production/helm/loki/values.yaml

@@ -1097,7 +1097,7 @@ gateway:
     # -- Config file contents for Nginx. Passed through the `tpl` function to allow templating
     # @default -- See values.yaml
     file: |
-      {{- include "loki.nginxFile" . | indent 2 -}}
+      {{- include "loki.nginxFile" . }}
 # -- If running enterprise and using the default enterprise gateway, configs go here.
 enterpriseGateway:
   # -- Define the amount of instances