Add entrypoint script for Docker container

Introduces entrypoint.sh to handle database migrations before starting the Flask app. Updates Dockerfile to use the new entrypoint script and ensures it is executable.

Dockerfile

@@ -2,10 +2,9 @@ FROM python:3.12-slim
 
 # Everything will be done in /app (Not in the main OS Image)
 WORKDIR /app
-
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
-
 COPY . .
+RUN pip install --no-cache-dir -r requirements.txt
+RUN chmod +x /entrypoint.sh
 
-CMD ["python", "app.py"]
+ENTRYPOINT ["/entrypoint.sh"]
+CMD []

entrypoint.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+echo "Running database migrations..."
+flask db upgrade
+
+echo "Starting Flask app..."
+python app.py