Use multi-stage build with pentacent/keila image

Dockerfile

@@ -1,32 +1,22 @@
 FROM cloudron/base:4.2.0
 
-# Install dependencies
-RUN mkdir -p /app/code /app/data
-WORKDIR /app/code
+# Use Keila's prebuilt image as base for the release
+FROM pentacent/keila:0.14 as keila-build
 
-# Install Erlang and Elixir from Ubuntu repos
+FROM cloudron/base:4.2.0
+
+# Install runtime dependencies
 RUN apt-get update \
-    && apt-get install -y erlang elixir \
-    && apt-get install -y git build-essential cmake nodejs npm postgresql-client \
+    && apt-get install -y postgresql-client \
     && rm -rf /var/lib/apt/lists/*
 
-# Set environment variables
-ENV MIX_ENV=prod
+# Create directories
+RUN mkdir -p /app/code /app/data
 
-# Clone and build Keila
-RUN git clone --depth 1 --branch v0.14.7 https://github.com/pentacent/keila.git . \
-    && mix local.hex --force \
-    && mix local.rebar --force \
-    && mix deps.get --only prod \
-    && mix deps.compile \
-    && cd assets && npm ci && npm run deploy && cd .. \
-    && mix phx.digest \
-    && mix release
+# Copy Keila from build stage
+COPY --from=keila-build /opt/app /tmp/keila-release
 
-# Copy initialization data
-RUN cp -r _build/prod/rel/keila /tmp/keila-release
-
-# Copy start script
+# Copy configuration files
 COPY start.sh /app/code/start.sh
 COPY nginx.conf /etc/nginx/sites-available/default
 
@@ -34,6 +24,8 @@ COPY nginx.conf /etc/nginx/sites-available/default
 RUN chmod +x /app/code/start.sh \
     && chown -R cloudron:cloudron /app/code /app/data /tmp/keila-release
 
+WORKDIR /app/code
+
 EXPOSE 4000
 
 CMD ["/app/code/start.sh"]