Update build/preview scripts

build.sh

@@ -14,10 +14,15 @@ if [ "$(uname)" == "Darwin" ]; then
 
 elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
     # Running on Linux.
+    # there isn't an antora/aarch64 container, antora can be installed locally
     # Check whether podman is available, else faill back to docker
     # which requires root.
 
-    if [ -f /usr/bin/podman ]; then
+    if [ -f /usr/local/bin/antora ]; then
+        /usr/local/bin/antora $cmd
+    elif [[ `uname -m` == "aarch64" ]]; then
+        echo "no antora/aarch64 container try just \`npm install -g @antora/cli @antora/site-generator-default\`"
+    elif [ -f /usr/bin/podman ]; then
         echo ""
         echo "This build script is using Podman to run the build in an isolated environment."
         echo ""

preview.sh

@@ -1,13 +1,13 @@
 #!/bin/sh
 
-if [ "$(uname)" == "Darwin" ]; then
+if [ "$(uname)" = "Darwin" ]; then
     # Running on macOS.
     # Let's assume that the user has the Docker CE installed
     # which doesn't require a root password.
     echo "The preview will be available at http://localhost:8080/"
-    docker run --rm -v $(pwd):/antora:ro -v $(pwd)/nginx.conf:/etc/nginx/conf.d/default.conf:ro -p 8080:80 nginx
+    docker run --rm -v "$(pwd):/antora:ro" -v "$(pwd)/nginx.conf:/etc/nginx/conf.d/default.conf:ro" -p 8080:80 nginx
 
-elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+elif [ "$(expr substr "$(uname -s)" 1 5)" = "Linux" ]; then
     # Running on Linux.
     # Fedora Workstation has python3 installed as a default, so using that
     echo ""