feat(haproxy): Add GPS_PORT env var, simplify structure

env/fqdn_context.env.example

@@ -1,36 +1,9 @@
 CONTEXT=ux_vilnius
-
+GPS_PORT=62000
-
+HAPROXY_VERSION=latest
-
-# Set something sensible here and uncomment
-# ---
-# HAPROXY_VERSION=x.y.z
-
-
-
-# On which port do you want HAProxy's statistics page exposed?
 STATS_PORT=61000
-
-
-
-# Feel free to leave defaults. They apply while these vars are commented out
-# ---
-# RESTARTPOLICY=unless-stopped
-# TIMEZONE=Etc/UTC
-
-
-
-# Subnet to use for this Docker Compose project. Docker defaults to
-# container networks in prefix 172.16.0.0/12 which is 1 million addresses in
-# the range from 172.16.0.0 to 172.31.255.255. Docker uses 172.17.0.0/16 for
-# itself. Use any sensible prefix in 172.16.0.0/12 here except for Docker's
-# own 172.17.0.0/16.
-# ---
 SUBNET=172.30.95.0/24
 
-
+# Other available defaults
-
+# RESTARTPOLICY=unless-stopped
-# See 'docker-compose.override.yml' for how to make a variable available in
+# TIMEZONE=Etc/UTC
-# a Dockerfile
-# ---
-# EXAMPLE_ARG_FROM_ENV_FILE=must_be_available_in_dockerfile