Add Github Action to build container

.github/workflows/docker-image.yml

@@ -0,0 +1,38 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "master" ]
+  workflow_dispatch:
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Log in to the Container registry
+        uses: docker/login-action@e92390c5fb421da1463c202d546fed0ec5c39f20
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=sha
+      - name: Build and push Docker image
+        uses: docker/build-push-action@2cdde995de11925a030ce8070c3d77a52ffcf1c0
+        with:
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

lib/pochven_bot.rb

@@ -17,7 +17,7 @@ class PochvenBot
   DASH      = '-'.freeze
 
   def initialize
-    @bot ||= Discordrb::Commands::CommandBot.new(token: config['bot_token'], prefix: prefix_proc)
+    @bot ||= Discordrb::Commands::CommandBot.new(token: ENV['BOT_TOKEN'], prefix: prefix_proc)
   end
 
   def run