Updated development Dockerfile and entrypoint per Gemini's recommendations

Dockerfile.dev

@@ -1,16 +1,27 @@
-FROM ruby:3.4
+FROM ruby:3.4-slim
 
-RUN gem install bundler
+# 1. Install essential build tools for gems like 'pg' or 'sqlite3'
+RUN apt-get update -qq && apt-get install -y \
+    build-essential \
+    libpq-dev \
+    curl \
+    git
 
 WORKDIR /usr/src/game-data
 
-COPY Gemfile Gemfile.l*ck ./
+# 2. Set environment variables for the Gem volume we discussed
+ENV BUNDLE_PATH=/usr/local/bundle \
+    BUNDLE_BIN=/usr/local/bundle/bin \
+    PATH=/usr/local/bundle/bin:$PATH
 
-RUN bundle check || bundle install
-
-RUN gem install rake
+# 3. Copy Gemfile first to leverage layer caching
+COPY Gemfile Gemfile.lock ./
+RUN bundle install
 
+# 4. Copy the application code
 COPY . ./
 
-ENTRYPOINT ["bash", "entrypoints/dev.sh"]
+# 5. Make sure your entrypoint script is executable
+RUN chmod +x entrypoints/dev.sh
 
+ENTRYPOINT ["bash", "entrypoints/dev.sh"]