Prepare docker image for labs

Signed-off-by: George Melikov <[email protected]>

Author: gmelikov

.github/workflows/docker-publish.yml

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+name: Docker
+on:
+  push:
+    branches: [ master ]
+    # Publish semver tags as releases.
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ master ]
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository_owner }}/debian_lab
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        with:
+          context: ./tools/container/
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

tools/container/Dockerfile

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+FROM debian
+
+WORKDIR /source
+RUN apt-get update \
+ && apt-get install --no-install-recommends -y iproute2 tcpdump \
+ && apt-get autoremove \
+ && apt-get clean \
+ && rm -rf /var/lib/apt/lists/*
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

tools/container/entrypoint.sh

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+#!/bin/bash
+
+# lab4
+echo aXAgcm91dGUgYWRkIGJsYWNraG9sZSAxNzIuMTguMC4xICMgIFdFJ1JFIEhJUklORyEgOikK | base64 -d | sh
+
+
+exec "$@"