Flesh out docker-compose Cookiecutter template

docker-compose/{{ cookiecutter.__project_slug }}/env/fully.qualified.domain.name.example

@@ -0,0 +1,32 @@
+CONTEXT={{ cookiecutter.__context_slug }}
+
+
+
+# Set something sensible here and uncomment
+# ---
+{%- set components = cookiecutter.__component_list_slug.split(',') -%}
+{% for component in components %}
+# {{ component.upper() }}_VERSION=x.y.z
+{%- endfor %}
+
+
+
+# A ${LOCATION} var is usually not needed. It may be helpful when a ${CONTEXT}
+# extends over more than one location e.g. to bind-mount location-specific
+# config files or certificates into a container.
+# ---
+# LOCATION=
+
+
+
+# Feel free to leave defaults. They apply while these vars are commented out
+# ---
+# RESTARTPOLICY=unless-stopped
+# TIMEZONE=Etc/UTC
+
+
+
+# See 'docker-compose.override.yml' for how to make a variable available in
+# a Dockerfile
+# ---
+# EXAMPLE_ARG_FROM_ENV_FILE=must_be_available_in_dockerfile