Task: Set alert on the website changes

n8n workflow JSON:
{"id":"1","name":"Website check","nodes":[{"name":"HTTP Request","type":"n8n-nodes-base.httpRequest","position":[400,300],"parameters":{"url":"","options":{},"responseFormat":"string"},"typeVersion":1},{"name":"IF","type":"n8n-nodes-base.if","position":[550,300],"parameters":{"conditions":{"string":[{"value1":"={{$node[\"HTTP Request\"].json[\"data\"]}}","value2":"Out Of Stock","operation":"contains"}]}},"typeVersion":1},{"name":"Discord","type":"n8n-nodes-base.discord","position":[700,300],"parameters":{"text":"value found","webhookUri":""},"typeVersion":1},{"name":"Discord1","type":"n8n-nodes-base.discord","position":[700,450],"parameters":{"text":"value not found","webhookUri":""},"typeVersion":1},{"name":"Cron","type":"n8n-nodes-base.cron","position":[210,300],"parameters":{"triggerTimes":{"item":[{"mode":"everyHour"}]}},"typeVersion":1}],"active":false,"settings":{"timezone":"America/Los_Angeles"},"connections":{"IF":{"main":[[],[{"node":"Discord1","type":"main","index":0}]]},"Cron":{"main":[[{"node":"HTTP Request","type":"main","index":0}]]},"HTTP Request":{"main":[[{"node":"IF","type":"main","index":0}]]}}}