Add Dockerfile and readme

.gitea/workflows/pipeline-build.yaml

@@ -0,0 +1,9 @@
+name: Build Pipeline for de.captica.n8n
+run-name: ${{ gitea.actor }} pushed  new changes to ${{ gitea.branch }}
+
+on: [push]
+
+jobs:
+  Publish Docker:
+    uses: captica-oss/de.captica.expert.devops/.gitea/workflows/publish-docker.yaml@main
+    secrets: inherit