rename .env, add newlines, branch in env var

init/docker/docker-compose.env.example

@@ -6,6 +6,7 @@ GRAFANA_USERNAME=admin
 GRAFANA_PASSWORD=admin
 GRAFANA_PLUGINS=grafana-clock-panel,natel-discrete-panel,grafana-piechart-panel
 
+UP_BRANCH=stable
 UP_POLLING_MODE=influx
 UP_INFLUX_URL=http://127.0.0.1:8086
 UP_UNIFI_USER=influx
@@ -18,4 +19,4 @@ UP_QUIET_MODE=false
 UP_DEBUG_MODE=false
 UP_POLLING_INTERVAL=30s
 UP_MAX_ERRORS=0
-UP_POLL_SITES=all
+UP_POLL_SITES=all

init/docker/docker-compose.yml

@@ -39,7 +39,7 @@ services:
       - GF_INSTALL_PLUGINS=${GRAFANA_PLUGINS}
   unifi-poller:
     restart: always
-    image: golift/unifi-poller:latest
+    image: golift/unifi-poller:${UP_BRANCH}
     environment:
       - UP_POLLING_MODE=${UP_POLLING_MODE}
       - UP_INFLUX_DB=${INFLUXDB_USERNAME}
@@ -60,4 +60,4 @@ services:
 volumes:
   influxdb-storage:
   chronograf-storage:
-  grafana-storage:
+  grafana-storage: