feat(gzip): add gzip configuration support and update default settings (#2867)

Co-authored-by: 澄潭 <zty98751@alibaba-inc.com>

helm/core/values.yaml

@@ -732,6 +732,26 @@ upstream:
   idleTimeout: 10
   connectionBufferLimits: 10485760
 
+# -- Gzip compression settings
+gzip:
+  enable: true
+  minContentLength: 1024
+  contentType:
+    - "text/html"
+    - "text/css"
+    - "text/plain"
+    - "text/xml"
+    - "application/json"
+    - "application/javascript"
+    - "application/xhtml+xml"
+    - "image/svg+xml"
+  disableOnEtagHeader: true
+  memoryLevel: 5
+  windowBits: 12
+  chunkSize: 4096
+  compressionLevel: "BEST_COMPRESSION"
+  compressionStrategy: "DEFAULT_STRATEGY"
+
 redis:
   redis:
     name: redis-stack-server