[CI] Add default value for env var

Author: PierreGauthier

api/.env

@@ -38,6 +38,7 @@ CORS_ALLOW_ORIGIN='^https?://(localhost|127\.0\.0\.1)(:[0-9]+)?$'
 
 # Manual Elasticsearch Configuration, we might remove redundancy in the future
 ELASTICSEARCH_URL=https://admin:!ChangeMe0!@search:9200/
+ELASTICSEARCH_SSL_VERIFICATION=true
 
 # Varnish URL for purging HTTP cache
 VARNISH_URL=http://varnish