ci: add drone file

.drone.yml

@@ -0,0 +1,48 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: build:binary
+    image: crystallang/crystal:1.7.3
+    volumes:
+      - name: cache
+        path: /_cache
+    commands:
+      - pwd
+      - apt-get update && apt-get install -y cmake g++
+      - shards install
+      - shards build --production --static
+      - strip bin/docmachine
+      - mkdir -p /_cache/bin
+      - cp -r bin/docmachine /_cache/bin/docmachine_linux_amd64
+
+  - name: publish:tag
+    image: curlimages/curl
+    environment:
+      PACKAGE_UPLOAD_URL: https://code.apps.glenux.net/api/packages/glenux/generic/mfm
+      PACKAGE_BASENAME: docmachine_linux_amd64
+      PACKAGE_UPLOAD_TOKEN:
+        from_secret: PACKAGE_UPLOAD_TOKEN
+    when:
+      ref:
+        include:
+          - refs/tags/**
+    volumes:
+      - name: cache
+        path: /_cache
+    commands:
+      - env |grep DRONE
+      - |
+        curl -H "Authorization: token $PACKAGE_UPLOAD_TOKEN" \
+             --upload-file /_cache/bin/docmachine_amd64 \
+           $PACKAGE_UPLOAD_URL/$DRONE_TAG/$PACKAGE_BASENAME
+
+# FIXME: handle multi-arch
+# FIXME: publish only on tags
+
+volumes:
+  - name: cache
+    temp: {}
+#