feat: add preview deploys with netlify (#972)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/972
Co-authored-by: konrad <k@knt.li>
Co-committed-by: konrad <k@knt.li>

.drone.yml

@@ -1,8 +1,7 @@
+---
 kind: pipeline
 name: build
 
-# TODO: update translations only nightly
-
 trigger:
   branch:
     include:
@@ -138,6 +137,21 @@ steps:
         - failure
         - success
 
+  - name: deploy-preview
+    image: node:16
+    pull: true
+    environment:
+      NETLIFY_AUTH_TOKEN:
+        from_secret: netlify_auth_token
+      NETLIFY_SITE_ID:
+        from_secret: netlify_site_id
+      GITEA_TOKEN:
+        from_secret: gitea_token
+    commands:
+      - node ./scripts/deploy-preview-netlify.js
+    depends_on:
+      - build-prod
+
 ---
 kind: pipeline
 name: release-latest
@@ -635,3 +649,8 @@ steps:
     environment:
       CROWDIN_KEY:
         from_secret: crowdin_key
+---
+kind: signature
+hmac: b343ca4448b29bcd26ba9888fa67926040b2f420d891b62e2e74ce487557c58c
+
+...