Add missing reference docs for packaging.* directives

Author: Gedochao

modules/directives/src/main/scala/scala/build/preprocessing/directives/Packaging.scala

@@ -21,8 +21,13 @@ import scala.cli.commands.SpecificationLevel
 @DirectiveExamples("//> using packaging.packageType assembly")
 @DirectiveExamples("//> using packaging.output foo")
 @DirectiveExamples("//> using packaging.provided org.apache.spark::spark-sql")
-@DirectiveExamples("//> using packaging.dockerFrom openjdk:11")
 @DirectiveExamples("//> using packaging.graalvmArgs --no-fallback")
+@DirectiveExamples("//> using packaging.dockerFrom openjdk:11")
+@DirectiveExamples("//> using packaging.dockerImageTag 1.0.0")
+@DirectiveExamples("//> using packaging.dockerImageRegistry virtuslab")
+@DirectiveExamples("//> using packaging.dockerImageRepository scala-cli")
+@DirectiveExamples("//> using packaging.dockerCmd sh")
+@DirectiveExamples("//> using packaging.dockerCmd node")
 @DirectiveUsage(
   """using packaging.packageType [package type]
     |using packaging.output [destination path]
@@ -32,11 +37,26 @@ import scala.cli.commands.SpecificationLevel
     |using packaging.dockerImageTag [image tag]
     |using packaging.dockerImageRegistry [image registry]
     |using packaging.dockerImageRepository [image repository]
+    |using packaging.dockerCmd [docker command]
     |""".stripMargin,
   """`//> using packaging.packageType` _package-type_
     |
     |`//> using packaging.output` _destination-path_
     |
+    |`//> using packaging.provided` _module_
+    |
+    |`//> using packaging.graalvmArgs` _args_
+    |
+    |`//> using packaging.dockerFrom` _base-docker-image_
+    |
+    |`//> using packaging.dockerImageTag` _image-tag_
+    |
+    |`//> using packaging.dockerImageRegistry` _image-registry_
+    |
+    |`//> using packaging.dockerImageRepository` _image-repository_
+    |
+    |`//> using packaging.dockerCmd` _docker-command_
+    |
     |""".stripMargin
 )
 @DirectiveDescription("Set parameters for packaging")

website/docs/commands/package.md

@@ -525,3 +525,12 @@ The using directive allows you to define the image repository.
 ```scala compile power
 //> using packaging.dockerImageRepository scala-cli
 ```
+
+#### packaging.dockerCmd
+
+The using directive allows you to override the executable used to run the application in docker, 
+otherwise it defaults to `sh` for the JVM platform and `node` for the JS platform
+
+```scala compile power
+//> using packaging.dockerCmd node
+```

website/docs/reference/directives.md

@@ -248,6 +248,20 @@ Set parameters for packaging
 
 `//> using packaging.output` _destination-path_
 
+`//> using packaging.provided` _module_
+
+`//> using packaging.graalvmArgs` _args_
+
+`//> using packaging.dockerFrom` _base-docker-image_
+
+`//> using packaging.dockerImageTag` _image-tag_
+
+`//> using packaging.dockerImageRegistry` _image-registry_
+
+`//> using packaging.dockerImageRepository` _image-repository_
+
+`//> using packaging.dockerCmd` _docker-command_
+
 
 
 #### Examples
@@ -257,9 +271,19 @@ Set parameters for packaging
 
 `//> using packaging.provided org.apache.spark::spark-sql`
 
+`//> using packaging.graalvmArgs --no-fallback`
+
 `//> using packaging.dockerFrom openjdk:11`
 
-`//> using packaging.graalvmArgs --no-fallback`
+`//> using packaging.dockerImageTag 1.0.0`
+
+`//> using packaging.dockerImageRegistry virtuslab`
+
+`//> using packaging.dockerImageRepository scala-cli`
+
+`//> using packaging.dockerCmd sh`
+
+`//> using packaging.dockerCmd node`
 
 ### Platform