Add dockerfile for bot and build/publish actions

.github/workflows/docker/backend.yaml

@@ -0,0 +1,14 @@
+name: (Backend) Publish Docker Image
+
+on:
+  push:
+    paths:
+      - 'backend/**'
+
+jobs:
+  build:
+    uses: ./.github/workflows/docker/build.yaml
+    with:
+      image-name: backend
+      folder: backend
+      build-args: ""

.github/workflows/docker/bot.yaml

@@ -0,0 +1,14 @@
+name: (Bot) Publish Docker Image
+
+on:
+  push:
+    paths:
+      - 'bot/**'
+
+jobs:
+  build:
+    uses: ./.github/workflows/docker/build.yaml
+    with:
+      image-name: bot
+      folder: bot
+      build-args: ""

.github/workflows/docker/build.yaml

@@ -0,0 +1,53 @@
+name: Build
+
+on:
+  workflow_call:
+    inputs:
+      folder:
+        required: true
+        type: string
+      image-name:
+        required: true
+        type: string
+      build-args:
+        required: false
+        type: string
+
+jobs:
+  build:
+    name: Build Images
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2.2.1
+      - name: Login to container registry
+        uses: docker/login-action@v2.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Get base registry
+        run: |
+          echo "REGISTRY=ghcr.io/${GITHUB_REPOSITORY,,}" >> $GITHUB_ENV
+      - name: Set tag prefix
+        if: github.ref_name != 'main'
+        run: |
+          echo "TAG_PREFIX=${{ github.ref_name }}-" >> $GITHUB_ENV
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4.1.1
+        with:
+          images: ${{ env.REGISTRY }}/${{ inputs.image-name }}
+          tags: |
+            type=sha,prefix=${{ env.TAG_PREFIX }},format=short
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3.2.0
+        with:
+          context: ${{ inputs.folder }}
+          build-args: ${{ inputs.build-args }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ inputs.image-name }}:buildcache
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ inputs.image-name }}:buildcache,mode=max

bot/Dockerfile

@@ -0,0 +1,7 @@
+FROM python:3.10-slim-bullseye
+RUN mkdir /app
+ADD requirements.txt /app/requirements.txt
+WORKDIR /app
+RUN pip install -r requirements.txt
+ADD . /app
+CMD ["python", "bot.py"]