Added docker file

Dockerfile

@@ -0,0 +1,28 @@
+# Dockerfile for Dereth Tracker application
+FROM python:3.12-slim
+
+# Set working directory
+WORKDIR /app
+
+# Upgrade pip and install Python dependencies
+RUN python -m pip install --upgrade pip && \
+    pip install --no-cache-dir fastapi uvicorn pydantic pandas matplotlib websockets
+
+# Copy application code
+COPY static/ /app/static/
+COPY main.py /app/main.py
+COPY db.py /app/db.py
+COPY Dockerfile /Dockerfile
+# Expose the application port
+EXPOSE 8765
+
+# Default environment variables (override as needed)
+ENV DB_MAX_SIZE_MB=2048 \
+    DB_RETENTION_DAYS=7 \
+    DB_MAX_SQL_LENGTH=1000000000 \
+    DB_MAX_SQL_VARIABLES=32766 \
+    DB_WAL_AUTOCHECKPOINT_PAGES=1000 \
+    SHARED_SECRET=your_shared_secret
+
+# Run the FastAPI application with Uvicorn
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8765", "--reload", "--workers", "1"]