php version
=======================================
[
    "settings"=> [
      "analysis"=> [
        "char_filter"=> [
           "replace"=> [
            "type"=> "mapping",
            "mappings"=> [
              "&=> and "
            ]
          ]
        ],
        "filter"=> [
          "word_delimiter" => [
            "type" => "word_delimiter",
            "split_on_numerics" => false,
            "split_on_case_change" => true,
            "generate_word_parts" => true,
            "generate_number_parts" => true,
            "catenate_all" => true,
            "preserve_original"=>true,
            "catenate_numbers"=>true
          ],
          "german_stemmer" => [
            "type"=> "stemmer",
            "language"=> "light_german"
          ]
        ],
        "analyzer"=> [
          "rebuild_german"=> [
            "tokenizer"=> "whitespace",
            "filter"=> [
                "lowercase",
                "word_delimiter",
                "german_normalization",
                "german_stemmer"
            ]
          ]
        ]
     ]
  ]
]


js version
=======================================
PUT /alexa_camera_2020_01_09
{
    "settings": {
      "analysis": {
        "char_filter": {
           "replace": {
            "type": "mapping",
            "mappings": [
              "&=> and "
            ]
          }
        },
        "filter": {
          "word_delimiter" : {
            "type" : "word_delimiter",
            "split_on_numerics" : false,
            "split_on_case_change" : true,
            "generate_word_parts" : true,
            "generate_number_parts" : true,
            "catenate_all" : true,
            "preserve_original":true,
            "catenate_numbers":true
          },
          "german_stemmer" : {
            "type": "stemmer",
            "language": "light_german"
          }
        },
        "analyzer": {
          "rebuild_german": {
            "tokenizer": "whitespace",
            "filter": [
                "lowercase",
                "word_delimiter",
                "german_normalization",
                "german_stemmer"
            ]
          }
        }
     }
  }
}

{
    "settings": {
      "analysis": {
        "char_filter": {
           "replace": {
            "type": "mapping",
            "mappings": [
              "&=> and "
            ]
          }
        },
        "filter": {
          "word_delimiter" : {
            "type" : "word_delimiter",
            "split_on_numerics" : false,
            "split_on_case_change" : true,
            "generate_word_parts" : true,
            "generate_number_parts" : true,
            "catenate_all" : true,
            "preserve_original":true,
            "catenate_numbers":true
          },
          "german_stemmer" : {
            "type": "stemmer",
            "language": "light_german"
          }
        },
        "analyzer": {
          "rebuild_german": {
            "tokenizer": "whitespace",
            "filter": [
                "lowercase",
                "word_delimiter",
                "german_normalization",
                "german_stemmer"
            ]
          }
        }
     }
  }
}