Add drone yaml

.drone.yml

@@ -0,0 +1,38 @@
+---
+kind: pipeline
+name: run speculative plan
+type: docker
+
+platform:
+  os: linux
+  arch: arm64
+
+clone:
+  disable: true
+
+steps:
+  - name: clone terraform
+    image: alpine/git
+    environment:
+      SSH_KEY:
+        from_secret: private_ssh_key
+    commands:
+      - mkdir $HOME/.ssh
+      - echo "$SSH_KEY" > $HOME/.ssh/id_ed25519
+      - chmod 600 $HOME/.ssh/id_ed25519
+      - touch $HOME/.ssh/known_hosts
+      - chmod 600 $HOME/.ssh/known_hosts
+      - ssh-keyscan -H git.2martens.de > $HOME/.ssh/known_hosts 2>/dev/null
+      - git clone ssh://giteajim@git.2martens.de:22/2martens/terraform.git .
+      - git checkout $DRONE_COMMIT
+  - name: terraform plan
+    image: 2martens/terraform-drone-plugin
+    settings:
+      api_token:
+        from_secret: tfc_api_token
+      cloud_organization: 2martens
+      args: plan
+
+trigger:
+  branch:
+    - main