Provide very basic woodpecker integration

.woodpecker/deploy.yaml

@@ -0,0 +1,30 @@
+variables:
+  NIXOS_VERSION: "unstable"
+  NIXPKGS_ALLOW_UNFREE: "1"
+  NIXPKGS_ALLOW_INSECURE: "1"
+
+steps:
+  - name: Configure Nix Channels
+    commands:
+      - nix-channel --add https://nixos.org/channels/nixos-${NIXOS_VERSION} nixos
+      - nix-channel --update
+    when:
+      - evaluate: 'CI_PIPELINE_EVENT != "cron" && CI_PIPELINE_EVENT != "schedule"'
+
+  - name: Check Flake
+    commands:
+      - nix flake check
+    when:
+      - evaluate: 'CI_PIPELINE_EVENT != "cron" && CI_PIPELINE_EVENT != "schedule"'
+
+  - name: Deploy
+    commands:
+      # Init OpenSSH
+      - eval "$(ssh-agent -s)"
+      - chmod 0600 $SSH_PRIVATE_KEY
+      - ssh-add $SSH_PRIVATE_KEY
+      # Deploy everything
+      - nix develop --command deploy
+      when:
+      - evaluate: 'CI_PIPELINE_EVENT != "cron" && CI_COMMIT_BRANCH == "master"'
+