Create Dockerfile

Dockerfile

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+# Dockerfile
+FROM python:3.9-slim
+
+WORKDIR /app
+
+# Install nginx
+RUN apt-get update && apt-get install -y nginx
+
+# Copy requirements
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+# Copy the Streamlit app
+COPY app.py .
+
+# Copy nginx configuration
+COPY nginx.conf /etc/nginx/nginx.conf
+
+# Create nginx configuration with restricted CORS for elevatics.cloud
+RUN echo 'events {
+    worker_connections 1024;
+}
+
+http {
+    include       /etc/nginx/mime.types;
+    default_type  application/octet-stream;
+
+    upstream streamlit {
+        server localhost:8501;
+    }
+
+    server {
+        listen 7860;  # Changed from 80 to 7860
+        server_name localhost;
+
+        # Restricted CORS configuration for elevatics.cloud
+        add_header Access-Control-Allow-Origin "https://elevatics.cloud" always;
+        add_header Access-Control-Allow-Methods "GET, POST, OPTIONS" always;
+        add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization" always;
+        add_header X-Frame-Options "ALLOW-FROM https://elevatics.cloud" always;
+        add_header Content-Security-Policy "frame-ancestors https://elevatics.cloud" always;
+        
+        # Handle OPTIONS method
+        if ($request_method = "OPTIONS") {
+            add_header Access-Control-Allow-Origin "https://elevatics.cloud" always;
+            add_header Access-Control-Allow-Methods "GET, POST, OPTIONS" always;
+            add_header Access-Control-Allow-Headers "DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization" always;
+            add_header Access-Control-Max-Age 1728000;
+            add_header Content-Type text/plain;
+            add_header Content-Length 0;
+            return 204;
+        }
+
+        location / {
+            proxy_pass http://streamlit;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            proxy_redirect off;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            
+            # Additional security headers for iframe
+            add_header X-Frame-Options "ALLOW-FROM https://elevatics.cloud" always;
+            add_header Content-Security-Policy "frame-ancestors https://elevatics.cloud" always;
+        }
+    }
+}' > /etc/nginx/nginx.conf
+
+# Create requirements.txt
+RUN echo 'streamlit==1.24.0\npandas==1.5.3\nnumpy==1.24.3' > requirements.txt
+
+# Create start script
+RUN echo '#!/bin/bash\nservice nginx start\nstreamlit run app.py' > start.sh
+RUN chmod +x start.sh
+
+EXPOSE 7860  # Changed from 80 to 7860
+
+CMD ["./start.sh"]