Implement proper Cloudron structure with supervisor

Dockerfile

@@ -1,27 +1,22 @@
-FROM pentacent/keila:0.14
+FROM cloudron/base:4.2.0
 
-# Install Cloudron requirements
-USER root
-RUN addgroup --gid 1000 cloudron && adduser --disabled-password --gecos "" --uid 1000 --gid 1000 cloudron
-
-# Install additional packages
+# Install runtime dependencies
 RUN apt-get update && apt-get install -y \
-    nginx \
     postgresql-client \
-    sudo \
+    supervisor \
     && rm -rf /var/lib/apt/lists/*
 
-# Setup directories
-RUN mkdir -p /app/code /app/data /tmp/nginx \
-    && chown -R cloudron:cloudron /app/code /app/data
+# Copy Keila from official image
+COPY --from=pentacent/keila:0.14 /opt/app /app/pkg
 
 # Copy configuration files
 COPY start.sh /app/code/start.sh
+COPY supervisor/ /etc/supervisor/conf.d/
 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
+RUN chmod +x /app/code/start.sh && \
+    chown -R cloudron:cloudron /app/code /app/pkg
 
 WORKDIR /app/code