add arm support

.drone.yml

@@ -2,25 +2,27 @@ kind: pipeline
 name: default
 
 steps:
-- name: write_tags
-  image: busybox
-  commands:
-    - echo -n "latest," > .tags
-    - grep "ENV VERSION" Dockerfile | cut -d '=' -f2 >> .tags
-
-- name: build_and_deploy_samservices  
-  image: plugins/docker
-  settings:
-    username: samservices
-    password:
-      from_secret: docker_password
-    repo: registry.samservices.de/subsonic
-    registry: registry.samservices.de
-
-- name: build_and_deploy_hub_docker
+- name: build_amd64 
   image: plugins/docker
   settings:
     username: unclesamwk
     password:
       from_secret: docker_hub_password
     repo: unclesamwk/subsonic
+    build_args:
+      - BUILD_ARCH=amd64
+    tags:
+    - latest
+    - amd64
+
+- name: build_arm32v7
+  image: plugins/docker
+  settings:
+    username: unclesamwk
+    password:
+      from_secret: docker_hub_password
+    repo: unclesamwk/subsonic
+    build_args:
+      - BUILD_ARCH=arm32v7
+    tags:
+      - arm32v7

Dockerfile

@@ -1,6 +1,10 @@
-FROM alpine:edge
+ARG BUILD_ARCH
+
+FROM ${BUILD_ARCH}/alpine:edge
 MAINTAINER Samuel Warkentin <sam@sam-services.de>
 
+ARG ARCH=arm64
+
 RUN apk --update add openjdk8-jre ffmpeg supervisor
 
 ENV VERSION=6.1.5