Add product search (#64)

src/datasources/keyword-api.ts

@@ -55,6 +55,14 @@ ORDER BY keywords.value
       .then((row) => this.getType(row));
   }
 
+  async searchKeywords(name: string): Promise<Array<Keyword>> {
+    return this.knex
+      .select('*')
+      .from('keywords')
+      .leftJoin('keyword_type', 'keyword_type.keyword_id', 'keywords.id')
+      .whereRaw(`LOWER(value) LIKE ?`, [`${name}`]);
+  }
+
   async setProductKeywords(
     productId: number,
     keywordIds: Array<number>,