enable arm64 and arm 32-bit architectures

Author: joonas-fi

.github/workflows/build.yml

@@ -8,6 +8,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
+    - uses: docker/setup-buildx-action@v1
+
     - name: Build
       run: |
         curl --fail --location --silent --output bob https://function61.com/go/turbobob-latest-stable-linux-amd64 && chmod +x bob

Dockerfile

@@ -1,5 +1,9 @@
 FROM ubuntu:latest
 
+# can't have default values here, otherwise they'd overwrite the buildx-supplied ones
+ARG TARGETOS
+ARG TARGETARCH
+
 RUN apt update && DEBIAN_FRONTEND=noninteractive apt install -y \
 	xvfb \
 	x11vnc \
@@ -36,4 +40,4 @@ ADD misc/menu.xml /etc/xdg/openbox/
 
 CMD ["/usr/local/bin/screen-server", "run"]
 
-ADD rel/screen-server_linux-amd64 /usr/local/bin/screen-server
+ADD rel/screen-server_linux-$TARGETARCH /usr/local/bin/screen-server

turbobob.json

@@ -16,12 +16,15 @@
 		}
 	],
 	"os_arches": {
-		"linux-amd64": true
+		"linux-amd64": true,
+		"linux-arm64": true,
+		"linux-arm": true
 	},
 	"docker_images": [
 		{
 			"image": "fn61/screen-server",
-			"dockerfile_path": "Dockerfile"
+			"dockerfile_path": "Dockerfile",
+			"platforms": ["linux/amd64", "linux/arm64", "linux/arm/v7"]
 		}
 	]
 }