Added docker file

Dockerfile

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+# 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"]

docker-compose.yml

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+version: "3.8"
+
+services:
+  dereth-tracker:
+    build: .
+    ports:
+      - "127.0.0.1:8765:8765"
+    volumes:
+      # Mount local database file for persistence
+      - "./dereth.db:/app/dereth.db"
+      - "./main.py:/app/main.py"
+      - "./db.py:/app/db.py"
+      - "./static:/app/static"
+    environment:
+      # Override database and application settings as needed
+      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"
+    restart: unless-stopped