Improve overall configuration and support

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

.env.production.sample

@@ -0,0 +1,22 @@
+# Settings
+MOBILIZON_INSTANCE_NAME="<%= instance_name %>"
+MOBILIZON_INSTANCE_HOST="<%= instance_domain %>"
+MOBILIZON_INSTANCE_EMAIL="<%= instance_email %>"
+MOBILIZON_INSTANCE_REGISTRATIONS_OPEN=true
+
+# API
+GRAPHQL_API_ENDPOINT="https://<%= instance_domain %>"
+GRAPHQL_API_FULL_PATH=""
+
+# APP
+MIX_ENV=prod
+PORT=4002
+MOBILIZON_LOGLEVEL="info"
+MOBILIZON_SECRET="<%= instance_secret %>"
+
+# Database
+MOBILIZON_DATABASE_USERNAME="mobilizon"
+MOBILIZON_DATABASE_PASSWORD="<%= database_password %>"
+MOBILIZON_DATABASE_DBNAME="mobilizon_prod"
+MOBILIZON_DATABASE_HOST="localhost"
+MOBILIZON_DATABASE_PORT=5432