Add container support

.github/workflows/build-and-test.yml

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+# Script taken from
+# https://github.com/darless1/gollum/blob/docker/.github/workflows/build-and-test.yml
+# MIT License
+
+name: Build and Test Docker
+on: [push, pull_request]
+
+env:
+  CI_IMAGE: ${{ secrets.DOCKER_HUB_USERNAME }}/w2wiki:dev-${{ github.sha }}
+  DEPLOY_IMAGE: ${{ secrets.DOCKER_HUB_USERNAME }}/w2wiki:latest
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v2
+      - name: Login
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Cache docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: ./
+          file: ./Containerfile
+          builder: ${{ steps.buildx.outputs.name }}
+          push: true
+          tags: ${{ env.CI_IMAGE }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}
+
+  deploy-on-master:
+    runs-on: ubuntu-latest
+    if: ${{ github.ref == 'refs/heads/master' }}
+    needs: build
+    steps:
+      - name: Login
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Pull
+        run: docker pull ${{ env.CI_IMAGE }}
+      - name: Tag
+        run: docker tag ${{ env.CI_IMAGE }} ${{ env.DEPLOY_IMAGE }}
+      - name: Push
+        run: docker push ${{ env.DEPLOY_IMAGE }}
+

Containerfile

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+FROM php:7-apache
+
+RUN docker-php-ext-install exif
+
+RUN set -eux; \
+	\
+	apt-get update; \
+	apt-get install -y --no-install-recommends git; \
+	rm -rf /var/lib/apt/lists/*; \
+	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false
+
+COPY --chown=www-data:www-data . /var/www/html
+
+RUN set -eux; \
+	\
+	sed -i "s/BASE_PATH \\. //" /var/www/html/config.php ;\
+	sed -i "s/'GIT_COMMIT_ENABLED', false/'GIT_COMMIT_ENABLED', true/" /var/www/html/config.php ;\
+	echo "" > /etc/apache2/mods-enabled/alias.conf
+
+VOLUME /pages
+EXPOSE 80
+
+CMD /var/www/html/container-start.sh

container-start.sh

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+#!/bin/bash
+set -e
+
+# on empty volume copy default pages
+if ! test -f /pages/Home.md ; then
+	cp /var/www/html/pages/* /pages
+
+	(
+		cd /pages
+		git init
+		git config user.email "w2wiki@w2wiki"
+		git config user.name "w2wiki"
+
+		git add -A .
+		git commit -m "Init with default pages"
+	)
+fi
+
+mkdir -p /pages/images
+chown -R www-data:www-data /pages
+
+exec apache2-foreground "$@"