Spring Boot projects are exactly the kind of project that Serverless FaaS are great at taking over.  ToF(x) will convert your Java 8m Groovy or Kotlin source code, provided to us in a JAR or WAR file. For Maven projects, ToF(x) builds both a Lambda function (the default build) and a "boot" configuration that you can still use on you datacenter EC2 instance or other VM. 
Some things to keep in mind before you submit your JAR or WAR file to ToF(x):

1. Send only source code, don't include .class files, as these are not needed and just take up too much space.  If you select to deploy to Lambda, ToF(x) will need to rebuild your project for Lambda anyways.
2. Be sure you are using Maven (soon Gradle will be supported) builds properly.
3. Note that since AWS Lambda, like all FaaS has a "start-up time" to load the JVM and Spring Boot, the first time the function is run, it may seem a bit slow to load.  Thereafter it will be faster, until is it not used again for 5 minutes, then AWS releases the JVM and your function, requiring "start-up" next time.  You probably wont notice this, we just thought you should know what is going on behind the scenes at AWS. ToF(x) is working on technology that will alleviate this, so check back soon.
AWS Lambda only supports Java 8. Most of the time this is not a problem for people, but if you do use special features of Java 9, 10, 11 or 12, you will need to first recode those parts to be Java 8 compliant. Be sure your pom.xml file or build.gradle file is setup for Java 8 (Java version 1.8) or ToF(x) wont allow the conversion to run.