chore(nix/package/docker/aio/env-processor): allow service selection at runtime

nix/docker/all_in_one/init/s6-services/configs/postgresql.conf

@@ -0,0 +1,23 @@
+# Configuration file for the PostgreSQL server.
+
+# PostgreSQL's database directory
+PGROOT="/var/lib/postgres"
+
+# PostgreSQL's database data directory
+PGDATA="/var/lib/postgres/data"
+
+# PostgreSQL's log file.
+PGLOG="/var/log/postgres.log"
+
+# Passed to initdb if necessary
+INITOPTS="-A peer --auth-host=md5 --auth-local=peer"
+
+# Extra options to run postmaster with, e.g.:
+# -N is the maximal number of client connections
+# -B is the number of shared buffers and has to be at least 2x the value for -N
+# Please read the man-page to postmaster for more options. Many of these options
+# can be set directly in the configuration-file.
+#PGOPTS="-N 512 -B 1024"
+
+# This configures the directives used for s6-log in the log service.
+DIRECTIVES="n3 s2000000 T"