fix: resolve pg_ctl path, export env vars, and fix nginx permissions

start.sh

@@ -1,33 +1,84 @@
 #!/bin/bash
-# 1. Initialize & Start Local PostgreSQL (as non-root user)
+
+# --- 1. Fix PostgreSQL Path ---
+# Add common PostgreSQL bin paths to $PATH so 'initdb' and 'pg_ctl' are found
+export PATH=/usr/lib/postgresql/17/bin:/usr/lib/postgresql/16/bin:/usr/lib/postgresql/15/bin:/usr/lib/postgresql/14/bin:$PATH
+
+# --- 2. Set Critical Environment Variables (Fixes Pydantic Error) ---
+export DATABASE_URL="postgresql+asyncpg://prepuser:password@127.0.0.1:5432/studentdb"
+export chroma_host="127.0.0.1"
+export chroma_port="8080"
+export chroma_collection="prepai_collection"
 export PGDATA=/home/user/postgres_data
 
-if [ ! -d "$PGDATA/base" ]; then
+# --- 3. Initialize & Start PostgreSQL ---
+if [ ! -d "$PGDATA" ]; then
     echo "Initializing database..."
     initdb -D "$PGDATA"
 fi
 
 echo "Starting PostgreSQL..."
-# Start server in the background
-pg_ctl -D "$PGDATA" -l /home/user/app/postgres.log start 
+# Start DB in background
+pg_ctl -D "$PGDATA" -l /home/user/postgres.log start
+sleep 3
 
-# Wait for service to initialize
-sleep 5
+# Create User and Database if they don't exist
+psql -h 127.0.0.1 -d postgres -c "CREATE USER prepuser WITH PASSWORD 'password';" || true
+createdb -h 127.0.0.1 -O prepuser studentdb || true
 
-# Set environment variable for psql to use correct auth (needed for local startup)
-export PGPASSWORD=password 
+# --- 4. Start Nginx (Non-Root Mode) ---
+# Create temp directories for Nginx to write to (avoids permission errors)
+mkdir -p /tmp/nginx/body \
+         /tmp/nginx/proxy \
+         /tmp/nginx/fastcgi \
+         /tmp/nginx/uwsgi \
+         /tmp/nginx/scgi
 
-# Execute database setup commands (no sudo needed, run as current user)
-# Attempt to create the user and database if they don't exist
-psql -h 127.0.0.1 -p 5432 -U postgres -d postgres -c "CREATE USER prepuser WITH PASSWORD 'password';" || true
-createdb studentdb -h 127.0.0.1 -p 5432 -U postgres || true
+# Generate a non-root compatible nginx config on the fly
+cat <<EOF > /tmp/nginx.conf
+worker_processes 1;
+daemon off;
+pid /tmp/nginx.pid;
+error_log /tmp/error.log;
+events { worker_connections 1024; }
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+    access_log /tmp/access.log;
+    client_body_temp_path /tmp/nginx/body;
+    proxy_temp_path       /tmp/nginx/proxy;
+    fastcgi_temp_path     /tmp/nginx/fastcgi;
+    uwsgi_temp_path       /tmp/nginx/uwsgi;
+    scgi_temp_path        /tmp/nginx/scgi;
 
-# 2. Start ChromaDB (in-process or separate port)
-chroma run --host 0.0.0.0 --port 8080 --path ./chroma_store &
+    server {
+        listen 7860;
+        server_name localhost;
+
+        location / {
+            root /usr/share/nginx/html;
+            index index.html index.htm;
+            try_files \$uri \$uri/ /index.html;
+        }
 
-# 3. Start Nginx
-service nginx start
+        location /api/v1/ {
+            proxy_pass http://127.0.0.1:8000/api/v1/;
+            proxy_set_header Host \$host;
+            proxy_set_header X-Real-IP \$remote_addr;
+        }
+    }
+}
+EOF
+
+# Start Nginx in the background using the custom config
+echo "Starting Nginx..."
+nginx -c /tmp/nginx.conf &
+
+# --- 5. Start ChromaDB ---
+echo "Starting ChromaDB..."
+chroma run --host 0.0.0.0 --port 8080 --path ./chroma_store &
 
-# 4. Start Backend
+# --- 6. Start Backend ---
+echo "Starting Backend..."
 cd Backend
 python run.py