refactor: migrate to external render postgres database

Dockerfile

@@ -9,19 +9,15 @@ RUN npm run build
 # --- Stage 2: Runtime ---
 FROM python:3.12-slim
 
-# Install system dependencies (Nginx, PostgreSQL, PortAudio)
+# Install system dependencies
+# Note: We keep libpq-dev for Python database libraries
 RUN apt-get update && apt-get install -y \
-    nginx postgresql postgresql-contrib postgresql-client \
+    nginx \
     build-essential portaudio19-dev libpq-dev git \
     && rm -rf /var/lib/apt/lists/*
 
-# Add PostgreSQL bin directory to PATH for non-root user (adjust version if necessary)
-ENV PATH="/usr/lib/postgresql/15/bin:$PATH"
-
 # Setup non-root user for HF Spaces (UID 1000)
 RUN useradd -m -u 1000 user
-# Create a data directory for PostgreSQL owned by the non-root user
-RUN mkdir -p /home/user/postgres_data && chown -R user:user /home/user/postgres_data
 WORKDIR /home/user/app
 
 # Copy Backend and install requirements
@@ -34,7 +30,6 @@ COPY --chown=user Backend/ ./Backend/
 COPY --chown=user --from=build-stage /app/frontend/dist /usr/share/nginx/html
 
 # Copy Configs
-# FIX: Removed citation tags and extra slashes below
 COPY --chown=user nginx.conf /etc/nginx/sites-available/default
 COPY --chown=user start.sh ./start.sh
 RUN chmod +x ./start.sh
@@ -43,7 +38,7 @@ RUN chmod +x ./start.sh
 ENV PORT=7860
 EXPOSE 7860
 
-# Set the non-root user as the default user for the container
+# Set the non-root user
 USER user
 
 # Run the startup script

start.sh

@@ -1,74 +1,20 @@
 #!/bin/bash
+set -e
 
-# --- 1. Dynamic PostgreSQL Path Detection ---
-PG_BIN_DIR=$(find /usr/lib/postgresql -name pg_ctl | head -n 1 | xargs dirname)
-if [ -z "$PG_BIN_DIR" ]; then
-    echo "❌ Error: Could not find PostgreSQL binaries."
-    exit 1
-fi
-echo "✅ Found PostgreSQL binaries at $PG_BIN_DIR"
-export PATH="$PG_BIN_DIR:$PATH"
-
-# --- 2. Set Critical Environment Variables ---
-export DATABASE_URL="postgresql+asyncpg://prepuser:password@127.0.0.1:5432/studentdb"
-export PGDATA=/home/user/postgres_data
+# --- 1. Set Environment Variables ---
 export HOME=/home/user
+# Use the DATABASE_URL from Hugging Face Secrets
+# ChromaDB settings
 export chroma_host="127.0.0.1"
 export chroma_port="8080"
 export chroma_collection="prepai_collection"
 
-# --- 3. Database Initialization ---
-if [ -d "$PGDATA" ] && [ ! -f "$PGDATA/PG_VERSION" ]; then
-    echo "⚠️  $PGDATA exists but is not a valid cluster. Wiping..."
-    rm -rf "$PGDATA"
-fi
-
-if [ ! -d "$PGDATA" ]; then
-    echo "⚙️  Initializing database..."
-    initdb -D "$PGDATA" --auth-local=trust --no-locale --encoding=UTF8
-fi
-
-# --- 4. Configure & Start PostgreSQL ---
-# FIX: Explicitly set the socket directory in the config file to avoid /var/run permissions issues
-if ! grep -q "unix_socket_directories" "$PGDATA/postgresql.conf"; then
-    echo "unix_socket_directories = '/tmp'" >> "$PGDATA/postgresql.conf"
-fi
-
-# Remove any stale lock files from previous crashes
-rm -f "$PGDATA/postmaster.pid"
-
-echo "🚀 Starting PostgreSQL..."
-# Try to start. If it fails, we continue (no set -e) so we can print logs.
-pg_ctl -D "$PGDATA" -l /home/user/postgres.log start
-
-# Wait a moment for startup...
-sleep 3
-
-# Check if it is actually running
-if ! pg_isready -h 127.0.0.1 -p 5432; then
-    echo "❌ PostgreSQL failed to start. Printing contents of postgres.log:"
-    echo "----------------------------------------------------------------"
-    cat /home/user/postgres.log
-    echo "----------------------------------------------------------------"
-    exit 1
-fi
-
-echo "✅ PostgreSQL is up and accepting connections!"
-
-# --- 5. User & DB Setup ---
-echo "🛠️  Configuring Database..."
-psql -h 127.0.0.1 -d postgres -tAc "SELECT 1 FROM pg_roles WHERE rolname='prepuser'" | grep -q 1 || \
-psql -h 127.0.0.1 -d postgres -c "CREATE USER prepuser WITH PASSWORD 'password';"
-
-psql -h 127.0.0.1 -d postgres -tAc "SELECT 1 FROM pg_database WHERE datname='studentdb'" | grep -q 1 || \
-createdb -h 127.0.0.1 -O prepuser studentdb
-
-# --- 6. ChromaDB Setup ---
+# --- 2. Start ChromaDB ---
 echo "🎨 Setting up ChromaDB..."
 mkdir -p ./chroma_store
 chroma run --host 0.0.0.0 --port 8080 --path ./chroma_store &
 
-# --- 7. Nginx Setup (Non-root) ---
+# --- 3. Start Nginx (Non-root Mode) ---
 echo "🌐 Starting Nginx..."
 mkdir -p /tmp/nginx/body /tmp/nginx/proxy /tmp/nginx/fastcgi /tmp/nginx/uwsgi /tmp/nginx/scgi
 
@@ -107,7 +53,9 @@ EOF
 
 nginx -c /tmp/nginx.conf &
 
-# --- 8. Start Backend ---
+# --- 4. Start Backend ---
 echo "🐍 Starting Backend..."
 cd Backend
+# Ensure tables are created in the new remote DB
+# (Your main.py lifespan event handles this via Base.metadata.create_all)
 python run.py