feat: Orchestrate application startup with `start_space.sh`, configure Nginx for container logging, and add `procps` to the Dockerfile.

Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && apt-get install -y \
     git \
     dos2unix \
     nginx \
+    procps \
     && rm -rf /var/lib/apt/lists/*
 
 # Create a non-root user

nginx.conf

@@ -1,6 +1,6 @@
 worker_processes 1;
 pid /tmp/nginx.pid;
-error_log /tmp/nginx.error.log;
+error_log stderr info; # Log to stderr to see errors in HF Space Logs
 
 events {
     worker_connections 1024;
@@ -10,7 +10,8 @@ http {
     include       /etc/nginx/mime.types;
     default_type  application/octet-stream;
 
-    access_log /tmp/nginx.access.log;
+    # HF Space runs as non-root, use /tmp for everything
+    access_log /dev/stdout;
     client_body_temp_path /tmp/client_temp;
     proxy_temp_path       /tmp/proxy_temp;
     fastcgi_temp_path     /tmp/fastcgi_temp;
@@ -32,6 +33,12 @@ http {
         listen 7860;
         server_name localhost;
 
+        # Health endpoint for HF readiness check
+        location /health {
+            proxy_pass http://fastapi/health;
+            proxy_set_header Host $host;
+        }
+
         # FastAPI Documentation
         location /docs {
             proxy_pass http://fastapi/docs;
@@ -62,11 +69,6 @@ http {
             proxy_set_header Host $host;
         }
 
-        location /health {
-            proxy_pass http://fastapi/health;
-            proxy_set_header Host $host;
-        }
-
         # Streamlit (Catch-all)
         location / {
             proxy_pass http://streamlit;
@@ -75,7 +77,7 @@ http {
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
             proxy_set_header X-Forwarded-Proto $scheme;
             
-            # WebSocket support
+            # WebSocket support for Streamlit
             proxy_http_version 1.1;
             proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection "upgrade";

scripts/start_space.sh

@@ -34,18 +34,36 @@ dvc pull models/random_forest_tfidf_gridsearch.pkl.dvc \
 # Create Nginx temp directories
 mkdir -p /tmp/client_temp /tmp/proxy_temp /tmp/fastcgi_temp /tmp/uwsgi_temp /tmp/scgi_temp
 
+echo "Checking models existence..."
+ls -la models/
+
 echo "Starting FastAPI application in background..."
-uvicorn hopcroft_skill_classification_tool_competition.main:app --host 127.0.0.1 --port 8000 &
+uvicorn hopcroft_skill_classification_tool_competition.main:app --host 127.0.0.1 --port 8000 >> /tmp/fastapi.log 2>&1 &
 
 # Wait for API to start
 echo "Waiting for API to start..."
-sleep 10
+sleep 15
 
 echo "Starting Nginx reverse proxy..."
-nginx -c /app/nginx.conf -g "daemon off;" &
+# Check if nginx is in path
+if ! command -v nginx &> /dev/null; then
+    echo "ERROR: nginx not found in PATH"
+    exit 1
+fi
+nginx -c /app/nginx.conf -g "daemon off;" >> /tmp/nginx_startup.log 2>&1 &
 
 echo "Waiting for Nginx to initialize..."
-sleep 2
+sleep 5
+
+# Check if Nginx is running
+if ps aux | grep -v grep | grep -q "nginx"; then
+    echo "Nginx is running."
+else
+    echo "ERROR: Nginx failed to start. Logs:"
+    cat /tmp/nginx_startup.log
+    # Try to start it without the config to see if it's a binary issue
+    # nginx -v
+fi
 
 echo "Starting Streamlit application..."
 export API_BASE_URL="http://127.0.0.1:8000"