Updated packaging instructions and Docker build steps.

Makefile.docker

@@ -4,10 +4,21 @@ ifeq ($(VERSION),)
 endif
 
 all:
-	docker build -t positronsecurity/ssh-audit:${VERSION} .
+	docker buildx create --name multiarch --use || exit 0
+	docker buildx build \
+		--platform linux/amd64,linux/arm64,linux/arm/v7 \
+		--tag positronsecurity/ssh-audit:${VERSION} \
+		--tag positronsecurity/ssh-audit:latest \
+		.
+	docker buildx build \
+		--tag positronsecurity/ssh-audit:${VERSION} \
+		--tag positronsecurity/ssh-audit:latest \
+		--load \
+		--builder=multiarch \
+		.
 
 upload:
-	docker login
+	docker login -u positronsecurity
 	docker buildx build \
 		--platform linux/amd64,linux/arm64,linux/arm/v7 \
 		--tag positronsecurity/ssh-audit:${VERSION} \

PACKAGING.md

@@ -2,7 +2,7 @@
 
 An executable can only be made on a Windows host because the PyInstaller tool (https://www.pyinstaller.org/) does not support cross-compilation.
 
-1.) Install Python v3.11.x from https://www.python.org/.  To make life easier, check the option to add Python to the PATH environment variable.
+1.) Install Python v3.x from https://www.python.org/.  To make life easier, check the option to add Python to the PATH environment variable.
 
 2.) Install Cygwin (https://www.cygwin.com/).
 
@@ -15,7 +15,7 @@ An executable can only be made on a Windows host because the PyInstaller tool (h
 
 # PyPI
 
-To create package and upload to test server:
+To create package and upload to test server (hint: use username '\_\_token\_\_' and API token for test.pypi.org):
 
 ```
     $ sudo apt install python3-virtualenv python3.10-venv
@@ -31,7 +31,7 @@ To download from test server and verify:
     $ pip3 install --index-url https://test.pypi.org/simple ssh-audit
 ```
 
-To upload to production server (hint: use username '\_\_token\_\_' and API token):
+To upload to production server (hint: use username '\_\_token\_\_' and API token for production pypi.org):
 
 ```
     $ make -f Makefile.pypi uploadprod
@@ -61,19 +61,22 @@ Upload the snap with:
     $ snapcraft export-login ~/snap_creds.txt
     $ export SNAPCRAFT_STORE_CREDENTIALS=$(cat ~/snap_creds.txt)
     $ snapcraft upload --release=beta ssh-audit_*.snap
-    $ snapcraft upload --release=stable ssh-audit_*.snap
+    $ snapcraft status ssh-audit  # Note the revision number of the beta channel.
+    $ snapcraft release ssh-audit X stable  # Fill in with the revision number.
 ```
 
 
 # Docker
 
+Ensure that the buildx plugin is available by following the installation instructions available at: https://docs.docker.com/engine/install/ubuntu/
+
 Build a local image with:
 
 ```
     $ make -f Makefile.docker
 ```
 
-Create a multi-architecture build and upload it to Dockerhub with:
+Create a multi-architecture build and upload it to Dockerhub with (hint: use the API token as the password):
 
 ```
     $ make -f Makefile.docker upload