Create Dockerfile

Dockerfile

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+FROM python:3.9-slim
+
+# 1. Install Database Servers and CLIs
+# We install sqlite3, postgresql-client, and mariadb-client
+# Reordered slightly to ensure Docker rebuilds this layer and installs sqlite3
+RUN apt-get update && apt-get install -y \
+    sqlite3 \
+    postgresql \
+    postgresql-client \
+    mariadb-server \
+    mariadb-client \
+    && rm -rf /var/lib/apt/lists/*
+
+# 2. Set up Python environment
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# 3. Copy application code & startup script
+COPY app.py .
+COPY start.sh .
+RUN chmod +x start.sh
+
+# 4. Fix Permissions for DB startup
+RUN mkdir -p /var/run/mysqld && \
+    chown -R postgres:postgres /var/lib/postgresql && \
+    chown -R mysql:mysql /var/lib/mysql && \
+    chown -R mysql:mysql /var/run/mysqld
+
+# 5. Expose the Hugging Face default port
+EXPOSE 7860
+
+# 6. Use the startup script as the entrypoint
+CMD ["./start.sh"]