adding node exporter, loki, and promtail

loki/rootfs/etc/services.d/nginx/finish

@@ -0,0 +1,13 @@
+#!/usr/bin/env bashio
+# ==============================================================================
+# Home Assistant Add-on: Loki
+# Take down the S6 supervision tree when Nginx fails
+# ==============================================================================
+
+declare APP_EXIT_CODE=${1}
+
+if [[ "${APP_EXIT_CODE}" -ne 0 ]] && [[ "${APP_EXIT_CODE}" -ne 256 ]]; then
+  bashio::log.warning "Halt add-on with exit code ${APP_EXIT_CODE}"
+  echo "${APP_EXIT_CODE}" > /run/s6-linux-init-container-results/exitcode
+  exec /run/s6/basedir/bin/halt
+fi

loki/rootfs/etc/services.d/nginx/run

@@ -0,0 +1,10 @@
+#!/usr/bin/with-contenv bashio
+# shellcheck shell=bash
+# ==============================================================================
+# Home Assistant Add-on: Loki
+# Runs the Nginx daemon
+# ==============================================================================
+bashio::net.wait_for 8080
+bashio::log.info "Starting NGinx..."
+
+exec /usr/sbin/nginx