loader section has a link at 202 to spark-master, but the spark-master section is missing. If Spark is not meant to be used on the single node installation, then this link should be remove. (Otherwise, docker-compose throws an error.)
Inconsistent reference to hard-coded paths in 140 and 141. Replace with references to the ENV variable (as in 93-94).
loadersection has a link at 202 tospark-master, but thespark-mastersection is missing. If Spark is not meant to be used on the single node installation, then this link should be remove. (Otherwise,docker-composethrows an error.)