Simplify Dockerfile to use pentacent/keila base directly

Dockerfile

@@ -1,20 +1,19 @@
-FROM cloudron/base:4.2.0
+FROM pentacent/keila:0.14
 
-# Use Keila's prebuilt image as base for the release
-FROM pentacent/keila:0.14 as keila-build
+# Install Cloudron requirements
+USER root
+RUN addgroup --gid 1000 cloudron && adduser --disabled-password --gecos "" --uid 1000 --gid 1000 cloudron
 
-FROM cloudron/base:4.2.0
-
-# Install runtime dependencies including Erlang
-RUN apt-get update \
-    && apt-get install -y postgresql-client erlang-base erlang-crypto erlang-ssl erlang-inets \
+# Install additional packages
+RUN apt-get update && apt-get install -y \
+    nginx \
+    postgresql-client \
+    sudo \
     && rm -rf /var/lib/apt/lists/*
 
-# Create directories
-RUN mkdir -p /app/code /app/data
-
-# Copy Keila from build stage
-COPY --from=keila-build /opt/app /tmp/keila-release
+# Setup directories
+RUN mkdir -p /app/code /app/data /tmp/nginx \
+    && chown -R cloudron:cloudron /app/code /app/data
 
 # Copy configuration files
 COPY start.sh /app/code/start.sh
@@ -22,8 +21,7 @@ COPY nginx.conf /etc/nginx/sites-available/default
 COPY nginx_main.conf /etc/nginx/nginx.conf
 
 # Set permissions
-RUN chmod +x /app/code/start.sh \
-    && chown -R cloudron:cloudron /app/code /app/data /tmp/keila-release
+RUN chmod +x /app/code/start.sh
 
 WORKDIR /app/code