added manifest feature

.drone.jsonnet

@@ -1,6 +1,10 @@
 local pipeline(os, arch) = {
   kind: "pipeline",
-  name: "build " + os + "/" + arch,
+  name: os + "/" + arch,
+  platform: {
+    "os": os,
+    "arch": arch,
+  },
   steps: [{
       name: "compile " + os + "/" + arch,
       image: "golang:1.15.6-alpine3.12",
@@ -34,7 +38,7 @@ local pipeline(os, arch) = {
         username: { "from_secret": "docker_username" },
         password: { "from_secret": "docker_password" },
         auto_tag: true,
-        //auto_tag_suffix: os + "-" + arch
+        auto_tag_suffix: os + "-" + arch
       },
       when: {
         event: "tag"
@@ -43,10 +47,32 @@ local pipeline(os, arch) = {
   ],
 };
 
+local manifest() = {
+  kind: "pipeline",
+  type: "docker",
+  name: "manifest",
+  depends_on: ["linux/arm64", "linux/amd64"],
+  when: {
+    event: "tag"
+  },
+
+  steps: [
+    {
+      name: "publish",
+      image: "plugins/manifest",
+      settings: {
+        auto_tag: true,
+        ignore_missing: true,
+        spec: "manifest.yml",
+        username: { "from_secret": "docker_username" },
+        password: { "from_secret": "docker_password" },
+      },
+    },
+  ],
+};
+
 [
   pipeline("linux", "amd64"),
-  // pipeline("linux", "arm64"),
-  // pipeline("darwin", "amd64"),
-  // pipeline("darwin", "arm64"),
-  // pipeline("windows", "amd64"),
+  pipeline("linux", "arm64"),
+  manifest()
 ]

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.12.3
+FROM alpine
 WORKDIR /opt/
 
 ADD ./release/*/*/ubnt-freifunk-map-api /opt/ubnt-freifunk-map-api

manifest.yml

@@ -0,0 +1,19 @@
+image: fftdf/ffmap-ubnt-api:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+{{#if build.tags}}
+tags:
+  - "latest"
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  -
+    image: fftdf/ffmap-ubnt-api:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    platform:
+      architecture: amd64
+      os: linux
+  -
+    image: fftdf/ffmap-ubnt-api:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64
+    platform:
+      architecture: arm64
+      os: linux