Update Traccar server to version 3.12. Add example commands in README.md

Dockerfile

@@ -1,8 +1,6 @@
 FROM java:8-jre-alpine
 
-MAINTAINER Maxim Zalysin <zalysin.m@gmail.com>
-
-ENV TRACCAR_VERSION 3.11
+ENV TRACCAR_VERSION 3.12
 
 WORKDIR /opt/traccar
 

README.md

@@ -4,6 +4,40 @@ Free and Open Source GPS Tracking Platform
 
 [![](https://images.microbadger.com/badges/image/magnaz/traccar.svg)](http://microbadger.com/images/magnaz/traccar "Get your own image badge on microbadger.com") [![](https://images.microbadger.com/badges/version/magnaz/traccar.svg)](http://microbadger.com/images/magnaz/traccar "Get your own version badge on microbadger.com")
 
-Current version: 3.11
+Current version: **3.12**
 
 Official website: https://www.traccar.org
+
+### Create container example:
+
+1. **Create work directories:**
+    ```bash
+    mkdir -p /var/docker/traccar/logs
+    ```
+
+1. **Get default traccar.xml:**
+    ```bash
+    docker run \
+    --rm \
+    --entrypoint cat \
+    magnaz/traccar:3.12 \
+    /opt/traccar/conf/traccar.xml > /var/docker/traccar/traccar.xml
+    ```
+
+1. **Edit traccar.xml: <https://www.traccar.org/configuration-file/>**
+
+1. **Create container:**
+    ```bash
+    docker run \
+    -d --restart always \
+    --name traccar \
+    --hostname traccar \
+    -p 80:8082 \
+    -p 5000-5150:5000-5150 \
+    -p 5000-5150:5000-5150/udp \
+    -v /etc/timezone:/etc/timezone:ro \
+    -v /etc/localtime:/etc/localtime:ro \
+    -v /var/docker/traccar/logs:/opt/traccar/logs:rw \
+    -v /var/docker/traccar/traccar.xml:/opt/traccar/conf/traccar.xml:ro \
+    image: magnaz/traccar:3.12
+    ```