add ability to build local variants from a ./.code directory

build.sh

@@ -2,7 +2,7 @@
 set -euo pipefail
 shopt -s extglob
 
-cd "$(dirname "$0")"
+readonly DIR="$(cd "$(dirname "$0")"; pwd)"
 
 if (( $# == 0 )); then
   readonly images=(core basic !(template|core|basic)/)
@@ -11,5 +11,13 @@ else
 fi
 
 for image in "${images[@]}"; do
-  podman build -t "code-${image%/}" -f "${image%/}/Containerfile"
+  if [[ "$image" == '.' ]]; then
+    tag="$(basename "$(pwd)")"
+    contdir='.code'
+  else
+    tag="$image"
+    contdir="$DIR/${image%/}"
+  fi
+
+  podman build -t "code-${tag}" -f "${contdir}/Containerfile"
 done