Better build script.

build.sh

@@ -1,8 +1,8 @@
 #!/usr/bin/env sh
 
 platforms() {
-    local plat="$(grep '^[^#].*' < arch.txt)"
-    local arch_count="$(echo "$plat" | wc -l)"
+    plat="$(grep '^[^#].*' < arch.txt)"
+    arch_count="$(echo "$plat" | wc -l)"
     echo "$plat" | tr '\n' ',' | cut -d, -f1-$arch_count
 }
 
@@ -11,9 +11,20 @@ create() {
 }
 
 build() {
-    local tagname="$1"
+    tagname="$1"
     docker pull 'alpine:latest'
     docker buildx build --push --tag="$tagname" --platform="$(platforms)" .
 }
 
+get_tag() {
+    git rev-parse --short HEAD
+}
+
+deploy() {
+    tag0="redxef/certbot-duckdns:$(get_tag)"
+    tag1="redxef/certbot-duckdns:latest"
+    build "$tag0"
+    build "$tag1"
+}
+
 "$@"