Build from the command line (and "install" the samples):

----
$ ./mvnw clean install
----

(If you like to YOLO add `-DskipTests`.)

Run one of the samples, e.g.

----
$ java -jar spring-cloud-function-samples/function-sample/target/*.jar
----

This runs the app and exposes its functions over HTTP, so you can
convert a string to uppercase, like this:

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$ curl -H "Content-Type: text/plain" localhost:8080/uppercase -d Hello
HELLO
----

You can convert multiple strings (a `Flux<String>`) by separating them
with new lines

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$ curl -H "Content-Type: text/plain" localhost:8080/uppercase -d 'Hello
> World'
HELLOWORLD
----

(You can use `^Q^J` in a terminal to insert a new line in a literal
string like that.)
