docs: docker: improved notes about templates

www/content/docker.md

@@ -53,7 +53,7 @@ dockers:
     goarm: ''
     # Name of the built binary that should be used.
     binary: mybinary
-    # Docker image name.
+    # Template of the Docker image name.
     image: myuser/myimage
     # Skips the docker push. Could be useful if you also do draft releases.
     # Defaults to false.
@@ -91,6 +91,7 @@ That can be accomplished simply by adding template language in the definition:
 
 ```yaml
 # .goreleaser.yml
+project: foo
 dockers:
   -
     binary: mybinary
@@ -99,7 +100,9 @@ dockers:
 
 This will build and public the following images:
 
-- `myuser/mybinary`
+- `myuser/foo`
+
+> Learn more about the [name template engine](/templates).
 
 ## Keeping docker images updated for current major
 
@@ -130,6 +133,8 @@ This will build and publish the following images:
 With these settings you can hopefully push several different docker images
 with multiple tags.
 
+> Learn more about the [name template engine](/templates).
+
 ## Applying docker build flags
 
 Build flags can be applied using `build_flag_templates`. The flags must be
@@ -155,3 +160,5 @@ docker build -t myuser/myimage . \
   --label=org.label-schema.version=1.6.4 \
   --label=org.label-schema.name=mybinary"
 ```
+
+> Learn more about the [name template engine](/templates).