chore: replace abandoned jekyll image with local Dockerfile

.dockerignore

@@ -0,0 +1,8 @@
+.git
+_site
+.jekyll-cache
+.jekyll-metadata
+.sass-cache
+.bundle
+vendor/bundle
+.DS_Store

Dockerfile

@@ -0,0 +1,14 @@
+FROM ruby:3.3-slim
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends build-essential git \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /site
+
+COPY Gemfile Gemfile.lock ./
+RUN bundle install
+
+EXPOSE 4000
+
+CMD ["bundle", "exec", "jekyll", "serve", "--host", "0.0.0.0", "--force_polling"]

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   jekyll:
-    image: bretfisher/jekyll-serve
+    build: .
     container_name: pyronear-website
     volumes:
       - .:/site