Add Docker, migrations, and initial database setup

Added Dockerfile and docker-compose.yaml for containerization. Introduced Alembic migrations with initial schema and a migration to alter column types. Added requirements.txt for dependencies and removed temp.py cleanup script. Updated .gitignore to allow tracking of migration files.

Dockerfile

@@ -0,0 +1,11 @@
+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 . .
+
+CMD ["python", "app.py"]