fix: hide banner in production by setting BANNER_COLOUR to empty string

Author: danieltruong

helm/eagle-api/values-prod.yaml

@@ -21,6 +21,7 @@ env:
   API_HOSTNAME: projects.eao.gov.bc.ca
   API_LOCATION: "https://projects.eao.gov.bc.ca"
   ENVIRONMENT: prod
+  BANNER_COLOUR: ""
   CHES_ENDPOINT: "https://ches.api.gov.bc.ca/api/v1"
   GETOK_ENDPOINT: "https://sso.pathfinder.gov.bc.ca"
   ANALYTICS_DEBUG: "false"