add drone config to create artifact for release

.drone.star

@@ -3,6 +3,8 @@ OC_CI_BUILDIFIER = "owncloudci/bazel-buildifier:latest"
 SONARSOURCE_SONAR_SCANNER_CLI = "sonarsource/sonar-scanner-cli:5.0"
 OC_CI_WAIT_FOR = "owncloudci/wait-for:latest"
 OCIS_IMAGE = "owncloud/ocis:5.0"
+PLUGINS_GITHUB_RELEASE = "plugins/github-release"
+OC_CI_ALPINE = "owncloudci/alpine:latest"
 
 dir = {
     "webConfig": "/drone/src/tests/drone/web.config.json",
@@ -12,7 +14,8 @@ def main(ctx):
     return checkStarlark() + \
            pnpmlint(ctx) + \
            unitTestPipeline(ctx) + \
-           e2eTests()
+           e2eTests() + \
+           releaseArtifacts()
 
 def checkStarlark():
     return [{
@@ -221,3 +224,58 @@ def ocisService():
             ],
         },
     ]
+
+def releaseArtifacts():
+    return [{
+        "kind": "pipeline",
+        "type": "docker",
+        "name": "create-artifacts",
+        "depends_on": ["e2e-tests"],
+        "steps": [
+            {
+                "name": "pnpm-build",
+                "image": OC_CI_NODEJS,
+                "commands": [
+                    "pnpm install",
+                    "pnpm build:w",
+                ],
+            },
+            {
+                "name": "check-dist",
+                "image": OC_CI_ALPINE,
+                "commands": [
+                    "ls -la dist",
+                ],
+            },
+            {
+                "name": "zip-artifacts",
+                "image": OC_CI_ALPINE,
+                "commands": [
+                    "if [ -d 'dist' ] && [ \"$(ls -A dist)\" ]; then cd dist && zip -r ../dicomviewer-viewer-${DRONE_TAG}.zip .; else echo 'Dist folder is empty or does not exist'; exit 1; fi",
+                    "md5sum dicomviewer-${DRONE_TAG}.zip > md5sum.txt",
+                    "sha256sum dicomviewer-${DRONE_TAG}.zip > sha256sum.txt",
+                ],
+            },
+            {
+                "name": "publish",
+                "image": PLUGINS_GITHUB_RELEASE,
+                "settings": {
+                    "api_key": {
+                        "from_secret": "GITHUB_TOKEN",
+                    },
+                    "files": [
+                        "dicomviewer-${DRONE_TAG}.zip",
+                        "md5sum.txt",
+                        "sha256sum.txt",
+                    ],
+                    "overwrite": True,
+                },
+            },
+        ],
+        "trigger": {
+            "ref": [
+                "refs/tags/**",
+                "refs/pull/**",  # remove this
+            ],
+        },
+    }]