Docker: Update ARMv7 docs and include dedicated make targets for ARM64

Makefile

@@ -210,6 +210,10 @@ docker-preview:
 	scripts/docker/multiarch.sh photoprism linux/amd64,linux/arm64
 docker-release:
 	scripts/docker/multiarch.sh photoprism linux/amd64,linux/arm64 $(DOCKER_TAG)
+docker-arm64-preview:
+	scripts/docker/arch.sh photoprism linux/arm64 arm64-preview
+docker-arm64-release:
+	scripts/docker/arch.sh photoprism linux/arm64 arm64
 docker-armv7-develop:
 	docker pull --platform=arm ubuntu:21.10
 	scripts/docker/arch.sh develop linux/arm armv7 /armv7

docker/examples/arm64/docker-compose.yml

@@ -7,7 +7,8 @@ version: '3.5'
 #   An "exec format" error will occur otherwise.
 # - Try explicitly pulling the ARM64 version if you've booted your device with the "arm_64bit=1" flag and you see
 #   the "no matching manifest" error on Raspberry Pi OS (Raspbian). See documentation for details.
-# - Use https://dl.photoprism.app/docker/armv7/docker-compose.yml for running PhotoPrism on ARMv7-based (32-bit) devices.
+# - Use https://dl.photoprism.app/docker/armv7/docker-compose.yml to run PhotoPrism and MariaDB on ARMv7-based devices
+#   as well as Raspberry Pi OS (Raspbian) installations without 64-bit support.
 # - Running PhotoPrism on a server with less than 4 GB of swap space or setting a memory/swap limit can cause unexpected
 #   restarts ("crashes"), for example, when the indexer temporarily needs more memory to process large files.
 # - If you see Docker errors related to "cgroups", it may help to add the following to /boot/firmware/cmdline.txt:

docker/examples/armv7/README

@@ -1,19 +1,26 @@
 # Running PhotoPrism on ARMv7-based devices (32-bit)
 
-You have to resort to alternative Docker images to run PhotoPrism and MariaDB on ARMv7-based devices
-and those with a 32-bit operating system:
+You may use the following 32-bit Docker images to run PhotoPrism and MariaDB on ARMv7-based devices
+as well as Raspberry Pi OS (Raspbian) installations without 64-bit support:
 
-PhotoPrism: photoprism/photoprism:armv7
-MariaDB   : linuxserver/mariadb:latest
+Stable Release     : photoprism/photoprism:armv7
+Development Preview: photoprism/photoprism:armv7-preview
+MariaDB            : linuxserver/mariadb:latest
 
-Darktable is not included in the ARMv7 version because it is not 32-bit compatible.
-Pay close attention to changed directory and environment variable names.
+Docker Hub URL:
+
+  https://hub.docker.com/r/photoprism/photoprism/tags?page=1&name=armv7
+
+Note that Darktable is not included in the ARMv7 image because it is not 32-bit compatible.
+Always choose the regular 64-bit version if your device supports it.
 
 If your device meets the system requirements, mostly the same installation instructions as for regular Linux
 servers apply:
 
   https://docs.photoprism.app/getting-started/docker-compose/
 
+Please pay close attention to changed directory and environment variable names!
+
 ### System Requirements ###
 
 - Your device should have at least 3 GB of physical memory. While PhotoPrism has been reported to work on devices with

scripts/docker/arch.sh

@@ -37,7 +37,7 @@ elif [[ $3 =~ $NUMERIC ]]; then
       -t photoprism/$1:latest \
       -t photoprism/$1:$3 \
       --push .
-else
+elif [[ $4 ]]; then
     echo "Building 'photoprism/$1:$3' in docker/${1/-//}$4/Dockerfile..."
     DOCKER_TAG=$(date -u +%Y%m%d)
     docker buildx build \
@@ -50,6 +50,19 @@ else
       -f docker/${1/-//}$4/Dockerfile \
       -t photoprism/$1:$3 \
       --push .
+else
+    echo "Building 'photoprism/$1:$3' in docker/${1/-//}/Dockerfile..."
+    DOCKER_TAG=$(date -u +%Y%m%d)
+    docker buildx build \
+      --platform $2 \
+      --pull \
+      --no-cache \
+      --build-arg BUILD_TAG=$DOCKER_TAG \
+      --build-arg GOPROXY \
+      --build-arg GODEBUG \
+      -f docker/${1/-//}/Dockerfile \
+      -t photoprism/$1:$3 \
+      --push .
 fi
 
 echo "Done"