Add an initial working configuration for LibreTranslate.

Config/LibreTranslate/env.example

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+# This file should be renamed '.env' and have any private values modified.
+
+COMPOSE_BAKE=true
+
+### Languages ###
+
+## Check for language model updates on each run.
+UPDATE_MODELS=true
+
+## Leave commented, blank, or set to "All" for default behavior.
+# LANGUAGES=
+# LANGUAGES=All
+
+## Otherwise set to a comma-separated list to enable only the desired models.
+LANGUAGES=en,es,fr,de
+
+### API Keys ###
+
+API_KEYS=true
+API_KEYS_DB_PATH=/app/db/api_keys.db
+API_KEYS_DIR=../../Volumes/LibreTranslate/api_keys
+
+### Models ###
+
+## Storing models prevents them from needing downloaded each run.
+## Placing them under Volumes means they will increase backup sizes.
+
+MODELS_DIR=../../Volumes/LibreTranslate/models
+
+## Not providing any location puts them in the default Docker /var/ location.
+# MODELS_DIR=
+
+## Storing them in /tmp/ will cause them to get reset after reboots, but hides
+## them from backup type locations such as Volumes/LibreTranslate and /var/.
+## This will require a CRON entry for prepping the project after a reboot.
+## `@reboot $DOCKER_HOME/Config/LibreTranslate/prep.sh`
+# MODELS_DIR=/tmp/LibreTranslate/models