Second attempt to fix hardcoded version #488

docs/deployment/docker.adoc

@@ -1,4 +1,5 @@
 = Docker image
+include::../.variables.adoc[]
 :toc: right
 
 This section describes the official Enonic XP docker image as well how to configure and run it.
@@ -11,9 +12,9 @@ If you just want to try out the image, with no data persistence, you can run thi
 
 NOTE: Running this command requires you to have docker installed.
 
-[source,bash]
+[source,bash,subs="attributes"]
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-docker run -it --rm -p 8080:8080 enonic/xp:7.12.2-ubuntu
+docker run -it --rm -p 8080:8080 enonic/xp:{version}-ubuntu
 ----
 
 == Image description
@@ -31,7 +32,7 @@ The goals of this docker image is to:
 
 === Base image
 
-Every time the Enonic XP image is built it will be based off the latest `enonic/graalvm` docker image. This ensures the latest updates to the JVM and OS.
+Every time the Enonic XP image is built it will be based off the latest https://hub.docker.com/r/enonic/graalvm[enonic/graalvm] docker image. This ensures the latest updates to the JVM and OS.
 
 === Enforced best practices
 
@@ -140,7 +141,7 @@ In this subection we list some `XP_OPTS` parameters that are useful when running
 
 ===== Memory
 
-Like described in the <<java-heap-memory>> section, you should set the java heap memory limits. If your machine has 4GB of memory and you want to allocate 75% of that to heap memory, do that by adding to `XP_OPTS`. 
+Like described in the <<java-heap-memory>> section, you should set the java heap memory limits. If your machine has 4GB of memory, and you want to allocate 75% of that to heap memory, do that by adding to `XP_OPTS`.
 
 [source,bash]
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