add docker files

.github/workflows/build_publish.yaml

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+name: Create and publish a Docker image to ghcr.io
+
+on:
+  push:
+    branches:
+      - main
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value={{date 'YYYYMMDD-HHmmss' tz='Europe/Stockholm'}}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

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+# Select base image (can be ubuntu, python, shiny etc)
+FROM python:3.10-slim
+
+# Create user name and home directory variables. 
+# The variables are later used as $USER and $HOME. 
+ENV USER=username
+ENV HOME=/home/$USER
+
+# Add user to system
+RUN useradd -m -u 1000 $USER
+
+# Set working directory (this is where the code should go)
+WORKDIR $HOME/datascience_toolkit
+
+# Update system and install dependencies.
+RUN apt-get update && apt-get install --no-install-recommends -y \
+    build-essential \
+    software-properties-common
+
+# Copy code and start script (this will place the files in home/username/)
+COPY .streamlit $HOME/datascience_toolkit/.streamlit
+COPY requirements.txt $HOME/datascience_toolkit/requirements.txt
+COPY pages $HOME/datascience_toolkit/pages/
+COPY images $HOME/datascience_toolkit/images/
+COPY data $HOME/datascience_toolkit/data/
+COPY Main.py $HOME/datascience_toolkit/Main.py
+COPY kgg_utils.py $HOME/datascience_toolkit/kgg_utils.py
+COPY start-script.sh $HOME/datascience_toolkit/start-script.sh
+
+RUN pip install --no-cache-dir -r requirements.txt \
+    && chmod +x start-script.sh \
+    && chown -R $USER:$USER $HOME \
+    && rm -rf /var/lib/apt/lists/*
+
+USER $USER
+EXPOSE 8501
+
+HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health
+
+ENTRYPOINT ["./start-script.sh"]

start-script.sh

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+#!/bin/bash
+
+streamlit run Main.py --server.port=8501 --server.address=0.0.0.0