ci: add woodpecker directory pipeline

.woodpecker/ci.yml

@@ -0,0 +1,48 @@
+when:
+  - event: [push, pull_request]
+
+steps:
+  backend:
+    image: golang:1.25
+    commands:
+      - cd backend
+      - go test ./...
+      - go build -o ../dist/osaet-admin ./cmd/osaet-admin
+
+  admin:
+    image: node:22-bookworm
+    commands:
+      - cd frontend/admin
+      - npm ci
+      - npm run build
+
+  site:
+    image: node:22-bookworm
+    commands:
+      - cd frontend/site
+      - npm ci
+      - npm run build
+
+  deploy:
+    image: alpine:3.20
+    when:
+      - event: push
+        branch: main
+    environment:
+      SSH_HOST:
+        from_secret: deploy_ssh_host
+      SSH_USER:
+        from_secret: deploy_ssh_user
+      SSH_PORT:
+        from_secret: deploy_ssh_port
+      SSH_PRIVATE_KEY:
+        from_secret: deploy_ssh_key
+      OSAET_ROOT:
+        from_secret: deploy_osaet_root
+    commands:
+      - apk add --no-cache openssh-client
+      - mkdir -p ~/.ssh
+      - printf '%s\n' "$SSH_PRIVATE_KEY" > ~/.ssh/id_ed25519
+      - chmod 600 ~/.ssh/id_ed25519
+      - ssh-keyscan -p "${SSH_PORT:-22}" "$SSH_HOST" >> ~/.ssh/known_hosts
+      - ssh -p "${SSH_PORT:-22}" "$SSH_USER@$SSH_HOST" "OSAET_ROOT='${OSAET_ROOT:-/opt/osaet}' bash '${OSAET_ROOT:-/opt/osaet}/app/deploy/deploy.sh'"