Task: Send location updates of the ISS to a topic in MQTT

n8n workflow JSON:
{"nodes":[{"name":"Cron","type":"n8n-nodes-base.cron","position":[490,360],"parameters":{"triggerTimes":{"item":[{"mode":"everyMinute"}]}},"typeVersion":1},{"name":"HTTP Request","type":"n8n-nodes-base.httpRequest","position":[690,360],"parameters":{"url":"https://api.wheretheiss.at/v1/satellites/25544/positions","options":{},"queryParametersUi":{"parameter":[{"name":"timestamps","value":"={{Date.now()}}"}]}},"typeVersion":1},{"name":"Set","type":"n8n-nodes-base.set","position":[890,360],"parameters":{"values":{"string":[{"name":"Name","value":"={{$json[\"0\"][\"name\"]}}"},{"name":"Latitude","value":"={{$json[\"0\"][\"latitude\"]}}"},{"name":"Longitude","value":"={{$json[\"0\"][\"longitude\"]}}"},{"name":"Timestamp","value":"={{$json[\"0\"][\"timestamp\"]}}"}]},"options":{},"keepOnlySet":true},"typeVersion":1},{"name":"MQTT","type":"n8n-nodes-base.mqtt","position":[1090,360],"parameters":{"topic":"iss-position","options":{}},"credentials":{"mqtt":"mqtt"},"typeVersion":1}],"connections":{"Set":{"main":[[{"node":"MQTT","type":"main","index":0}]]},"Cron":{"main":[[{"node":"HTTP Request","type":"main","index":0}]]},"HTTP Request":{"main":[[{"node":"Set","type":"main","index":0}]]}}}