Add some CI

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build image
+      run: docker-compose build
+    - name: Show image info
+      run: docker images
+    - name: Test config
+      run: docker-compose run slides nginx -t
+
+  shellcheck:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Install shellcheck
+      run: sudo apt-get update && sudo apt-get install -y shellcheck
+    - name: shellcheck
+      run: shellcheck docker-entrypoint.sh

.github/workflows/deploy.yml

@@ -0,0 +1,31 @@
+name: Deploy
+
+on:
+  push:
+    branches:
+      - 'master'
+  schedule:
+    - cron: '0 0 1 * *'  # Keep it up-to-date automatically
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push containers
+        uses: docker/build-push-action@v4
+        with:
+          push: true
+          tags: |
+            ghcr.io/realorangeone/slides:latest