chore: add github-release plugin (#540)

Signed-off-by: Andrew Rynhard <andrew@andrewrynhard.com>

.drone.yml

@@ -93,6 +93,38 @@ steps:
   depends_on:
   - basic-integration
 
+- name: release
+  image: autonomy/build-container:latest
+  pull: always
+  commands:
+  - make clean
+  - make release
+  volumes:
+  - name: dockersock
+    path: /var/run
+  when:
+    event: tag
+  depends_on:
+  - basic-integration
+
+- name: publish
+  image: plugins/github-release
+  settings:
+    api_key:
+      from_secret: github_token
+    title: release.txt
+    draft: true
+    note: CHANGELOG.md
+    files:
+    - build/*
+    checksum:
+    - sha256
+    - sha512
+  when:
+    event: tag
+  depends_on:
+  - release
+
 volumes:
 - name: dockersock
   temp: {}

.gitignore

@@ -20,3 +20,5 @@ coverage.txt
 
 # buildkit cache
 .buildkit/
+
+release.txt

Makefile

@@ -151,6 +151,7 @@ talos: buildkitd
 
 release: all talos-raw talos-gce talos
 	xz -e9 ./build/rootfs.raw
+	@ echo @(TAG) > release.txt
 
 test: buildkitd
 	@mkdir -p build