Merge pull request 'ci/woodpecker-ci' (#6) from ci/woodpecker-ci into main

Reviewed-on: https://codeberg.org/saint/pyfedi/pulls/6

.woodpecker.yaml

@@ -0,0 +1,10 @@
+steps:
+  - name: docker-build
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      repo: codeberg.org/${CI_REPO_OWNER}/pyfedi
+      registry: codeberg.org
+      tags: latest
+      username: ${CI_REPO_OWNER}
+      password:
+        from_secret: cb_token