First round of index tuning

- changes text analysis
- adds weigthts for content fields

Fixes: #19

Author: tmotyl

config/Elasticorn/docsearch/IndexConfiguration.yaml

@@ -1,2 +1,14 @@
 number_of_shards: 4
 number_of_replicas: 1
+analysis:
+  filter:
+    typo3_stemmer:
+      type: stemmer
+      language: minimal_english
+  analyzer:
+    typo3_analyzer:
+      filter:
+      - lowercase
+      - asciifolding
+      - typo3_stemmer
+      tokenizer: standard

src/Repository/ElasticRepository.php

@@ -188,6 +188,7 @@ public function findByQuery(SearchDemand $searchDemand): array
                         [
                             'query_string' => [
                                 'query' => $searchTerms,
+                                'fields' => [ 'page_title^10', 'snippet_title^20', 'snippet_content' ]
                             ],
                         ],
                     ],