As per tutorial on http://www.landoop.com/blog/2017/02/ftp-to-kafka/
If using the docker Kafka Development Environment build the code with sbt clean assembly
and then start the fast-data-dev docker by passing the location of the generated JAR file into the classpath of Kafka Connect
docker run --rm -it -p 2181:2181 -p 3030:3030 -p 8081:8081 -p 8082:8082 -p 8083:8083 \
-p 9092:9092 -e ADV_HOST=192.168.99.100 -e RUNTESTS=0 -e FORWARDLOGS=0 \
-v /Users/Antonios/ftp-kafka-converters/target/scala-2.11/:/connectors landoop/fast-data-dev