Update on_the_web page to include the tool Mattermost, which uses the…

… JSON Lines format (#86)

on_the_web/index.html

@@ -35,7 +35,7 @@ <h2>On the web</h2>
         <section id="main_content">
 
 <p><a href="https://github.com/pytest-dev/pytest-reportlog">pytest-reportlog</a> is a pytest plugin which writes testing report data in JSON lines format</p>
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 <p><a href="https://github.com/ndjson/ndjson-spec">NDJSON</a> is a similar format that also allows blank lines</p>
 
 <p><a href="https://okfnlabs.org/blog/2014/09/01/bubbles-python-etl.html">Bubbles</a> supports JSON Lines datastores</p>
@@ -47,17 +47,17 @@ <h2>On the web</h2>
 <p><a href="https://www.graylog.org/resources/gelf/">Graylog GELF</a> is format for log messages, their stream is de-facto JSON lines.</p>
 
 <p><a href="https://www.scrapy.org">Scrapy</a> is a framework for web scraping &amp; crawling, it supports and recommends JSON lines since long -- <a href="https://twitter.com/pablohoffman/status/547385799093022723">it might've even coined the term</a>.</p>
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 <p><a href="https://clickhouse.yandex/">ClickHouse</a> is an open source column-oriented DBMS. It supports JSON lines as <a href="https://clickhouse.yandex/reference_en.html#JSONEachRow">JSONEachRow</a> format for input and output.</p>
 
-<p><a href="https://dataflowkit.com">Dataflow kit</a> is a web scraping open source framework written in Go. JSON Lines is one of the supported formats for storing results.</p>   
+<p><a href="https://dataflowkit.com">Dataflow kit</a> is a web scraping open source framework written in Go. JSON Lines is one of the supported formats for storing results.</p>
 
 <p><a href="https://github.com/dart-lang/test/blob/master/pkgs/test/doc/json_reporter.md">dart</a> uses JSON Lines as one of the possible reporters when running tests.</p>
 
 <p><a href="https://spark.apache.org">Apache Spark</a> uses JSONL for reading and writing JSON data.</p>
 
 <p><a href="https://arangodb.com">ArangoDB</a> is an open source multi-model database. The JSON lines format allows to import huge amounts of documents sequentially (via <a href="https://www.arangodb.com/docs/stable/programs-arangoimport-examples-json.html">arangoimport</a>).</p>
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 <p><a href="https://www.rumbledb.org/">Rumble</a> is a JSONiq engine that runs on top of Spark. It can process datasets in the JSON lines format that have billions of objects and more.</p>
 
 <p><a href="https://neo4j.com/developer">Neo4j</a> the open-source graph database supports JSONL export and import via its standard library procedures <a href="https://neo4j.com/labs/apoc/4.1/export/json/#export-database-json"><code>apoc.export/import.json</code></a> to allow stream processing of nodes and relationships.</p>
@@ -74,13 +74,15 @@ <h2>On the web</h2>
 
 <p><a href="https://github.com/simonfrey/jsonl">Golang JSONL library</a></p>
 
-<p><a href="https://miller.readthedocs.io/en/latest/file-formats/#json-lines">Miller</a> supports JSON Lines format as input.</p>          
+<p><a href="https://miller.readthedocs.io/en/latest/file-formats/#json-lines">Miller</a> supports JSON Lines format as input.</p>
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+<p><a href="https://docs.mattermost.com/onboard/bulk-loading-data.html">Mattermost</a> is a collaboration tool and uses the JSON Lines format for bulk data import.</p>
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