remove external ports from docker-compose.yml (#978)
remove external ports from docker-compose.yml (#978)

* remove external ports from docker-compose.yml

also, update the PostgreSQL container to something less ancient

* use postgresql 11.10, as 12+ fails with the odbc-postgresql package

The version of odbc-postgresql in the Python docker images is too old
for PostgreSQL 12+
beniwohli/apm-agent-python,beniwohli/apm-agent-python,beniwohli/apm-agent-python,beniwohli/apm-agent-python