Build and deploy manual in CI

.ci/known_hosts

@@ -0,0 +1 @@
+sallie.librepush.net,79.143.178.141 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBHPJu+9XaDuDQA8jVdD++BSkazgVUt1c22oa+FoWiqWVWAVu33+Jh3Evc4s3HK6jMMuOIVs8AVnGAUY5eaqmJik=

.woodpecker.yml

@@ -0,0 +1,19 @@
+platform: linux/arm64
+
+pipeline:
+  deployManual:
+    image: rust:1.54.0-slim
+    when:
+      branch:
+        - develop
+    secrets:
+      - deploy_ssh_key
+    commands: # warning! Doesn't seem to like hashed known_hosts...
+      - cargo install -q mdbook
+      - DEBIAN_FRONTEND=noninteractive apt-get -qq update
+      - DEBIAN_FRONTEND=noninteractive apt-get -yqq install rsync ssh
+      - mdbook build
+      - echo "$DEPLOY_SSH_KEY" > /tmp/rsync_key
+      - chmod u=rw,go= /tmp/rsync_key
+      - rsync -e 'ssh -i /tmp/rsync_key -o "UserKnownHostsFile ./.ci/known_hosts"' -vaz --delete ./book/ space_docs_librepush_net@sallie.librepush.net:./public/scone
+      - rm /tmp/rsync_key