dockerfile: explicitly specify protocol in `EXPOSE` instructions
dockerfile: explicitly specify protocol in `EXPOSE` instructions

crobays/docker-postgresql,boky8/docker-postgresql,logandg/docker-postgis,markrowsoft/docker-postgres-bdr,whatever4711/rpi-postgresql,timclassic/docker-postgresql,sameersbn/docker-postgresql,bokysan/docker-postgresql,mental-docker/postgresql,zires/docker-postgresql,arkkanoid/docker-postgresql