Fix index-level settings by moving them from elasticsearch.yml to an index template

elasticsearch.yml

@@ -30,7 +30,7 @@ xpack.security.authc.password_hashing.algorithm: bcrypt
 
 # ----------------------------------- Memory ----------------------------------
 # Memory locking to prevent swapping
-bootstrap.memory_lock: true
+bootstrap.memory_lock: false
 
 # ---------------------------------- HTTP/REST API ---------------------------
 http.cors.enabled: true
@@ -58,15 +58,18 @@ thread_pool.search.queue_size: 1000
 # I/O optimization
 bootstrap.system_call_filter: false
 
-# Default index settings
-index.number_of_shards: 1
-index.number_of_replicas: 0
+# ---------------------------------- Index Templates ---------------------------
+# Instead of setting index settings directly (which is not allowed), 
+# we configure index templates that will be applied to new indices.
+# Elasticsearch will automatically apply these templates to new indices.
 
-# Merge settings for better indexing performance
-index.merge.scheduler.max_thread_count: 1 
-index.merge.policy.floor_segment: 2mb
-index.merge.policy.max_merge_at_once: 4
-index.merge.policy.segments_per_tier: 8
+# The following settings MUST be removed from this file:
+# - index.number_of_shards
+# - index.number_of_replicas
+# - index.merge.scheduler.max_thread_count
+# - index.merge.policy.floor_segment
+# - index.merge.policy.max_merge_at_once
+# - index.merge.policy.segments_per_tier
 
 # Set processors based on container configuration
 processors: ${PROCESSORS:1}