Initialize .env in env export templates

.templates/01-config_yaml.sh

@@ -74,6 +74,11 @@ if [[ "$CONFIGSOURCE" != *".yaml" ]]; then
     exit 1
 fi
 
+ENV_FILE="/.env"
+if [[ ! -f "$ENV_FILE" ]]; then
+    printf '# Generated by 01-config_yaml.sh from %s\n' "$CONFIGSOURCE" > "$ENV_FILE"
+fi
+
 # Permissions only if the config file already exists
 if [[ "$CONFIGSOURCE" == *".yaml" ]] && [ -f "$CONFIGSOURCE" ]; then
     echo "Setting permissions for the config.yaml directory"
@@ -174,7 +179,7 @@ while IFS= read -r line; do
             python3 /env.py
         fi
         # set .env
-        echo "$line" >> /.env
+        echo "$line" >> "$ENV_FILE"
         # set environment
         mkdir -p /etc
         echo "$line" >> /etc/environment