UPDATE REST API using Serverless Framework/AWS/Nodejs6.10/Javascript

Hi, I need a rest api to update some data on a dynamoDB, I'm using serverless framework to deploy on AWS lambda/api gateway using nodejs 6.10, only need the UPDATE call for the info params. Also I need the Unit test. 1. Data Base structure: The Primary partition key is: room (String) The Primary sort key is: recordingID (Number) The info object contains the following params: "info": { "M": { "date": {"S": "2013-05-29"}, "description": {"S": "description text "}, "hour": {"S": "11:12:50"}, "public": {"N": "1"}, "speaker-about": {"S": "speaker-about Text"}, "speaker-image": {"S": "speaker-image-link"}, "speaker-link": {"S": "speaker-link"}, "speaker-name": {"S": "speaker-name"}, "title": {"S": "title"} } } 2. The API must validate input data using this criteria: "date": date in the following format: YYYY-MM-DD: 2017-10-29 "description": this is a plain text, no html allowed. "hour": the format is HH:MM:SS like23:12:50 "public" boolean "speaker-about": plain text, no html allowed. "speaker-image": link with https (no http allowed) "speaker-link": link may have http or https "speaker-name": plain text, no html allowed. "title" plain text, no html allowed. *in the case of "plain text, no html allowed" i'm not sure if just fail the request with 400 when the payload cames with html tags or eliminates the html tag and save the text. what do you recommend? 3. Only one entry point Using only one entry point the API must update only the provided params on the payload, I mean, if in the payload only send info.speaker-name this must validate it and update only this data, in the other way, if the payload send more params or all (ex. speaker-name,speaker-link, etc) is must process it too. 4. Other stuff - I created a github project to manage this project: [login to view URL] - I prefer to use Joi for validation of JavaScript objects, but I'm open to evaluete another if you have a better one. 5. Deliverables: - the code that process the update call. - The unit test related to that call