Add Dockerfile and readme

.gitea/workflows/pipeline-build.yaml

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+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

Dockerfile

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+FROM node:22-slim
+
+
+
+# Update everything and install needed dependencies
+RUN apt-get update -y && \
+    apt-get upgrade -y && \
+    apt-get install -y -q graphicsmagick tzdata build-dependencies python build-base ca-certificates && \
+    useradd -r -U -d /opt/captica/${NAME_APPLICATION} -c "captica Service User" -m captica
+
+# # Set a custom user to not have n8n run as root
+USER captica
+
+# Install n8n and the also temporary all the packages
+# it needs to build it correctly.
+RUN N8N_VERSION=$(curl -s https://api.github.com/repos/n8n-io/n8n/releases/latest | jq -r '.tag_name' | sed 's/^v//') && \
+    echo "Latest n8n version: ${N8N_VERSION}" && \
+    npm_config_user=root npm install -g {N8N_VERSION} && \
+    apt-get remove build-dependencies build-base && \
+    apt-get autoremove -y && \
+    apt-get autoclean -y
+
+
+WORKDIR /data
+
+CMD ["n8n"]

README.md

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 # de.captica.n8n
 
-Customize n8n installation
+This project contains a Dockerfile to build a Docker image for [n8n](https://n8n.io/), a free and open-source node-based workflow automation tool.
+
+The original image of n8n is based on an alpine image which has some unusable tools
+
+## Table of Contents
+
+- [Prerequisites](#prerequisites)
+- [Building the Docker Image](#building-the-docker-image)
+- [Running the Docker Container](#running-the-docker-container)
+- [Customizing the Docker Image](#customizing-the-docker-image)
+- [License](#license)
+
+## Prerequisites
+
+- Docker installed on your system
+- Access to a Docker registry (optional)
+
+## Building the Docker Image
+
+To build the Docker image, navigate to the project directory and run the following command:
+
+```bash
+docker build -t de.captica.n8n .
+```
+This will build the Docker image using the Dockerfile in the current directory.
+
+## Running the Docker Container
+
+### To run the Docker container, use the following command
+
+```bash
+docker run -d -p 5678:5678 --name n8n de.captica.n8n
+```
+
+This will start a detached Docker container named "n8n" and expose port 5678 on your host machine. You can access n8n at http://localhost:5678 in your browser.
+
+### Customizing the Docker Image
+To customize the Docker image, you can modify the Dockerfile and rebuild the image. Here are some examples of customizations you might consider:
+1. Add custom workflows: Copy your workflows into the /data directory in the Dockerfile.
+2. Set environment variables: Use the ENV directive in the Dockerfile to set environment variables for n8n.
+3. Install additional packages: Use the RUN directive to install additional packages using apt-get or npm.
+
+## License
+This project is licensed under the MIT License. See the LICENSE file for more information.