Add Dockerfile and update app for Fly

Author: SM_SAYEED

Dockerfile.txt

@@ -0,0 +1,7 @@
+FROM python:3.11-slim
+WORKDIR /app
+COPY . /app
+RUN pip install --no-cache-dir -r requirements.txt
+ENV PORT 8080
+EXPOSE 8080
+CMD ["python", "app.py"]

app.py

@@ -445,4 +445,4 @@ def delete_dataset_file(property_name, tab, filename):
 
 # ========== MAIN ==========
 if __name__ == '__main__':
-    app.run(debug=True)
+    app.run(host="0.0.0.0", port=int(os.environ.get("PORT", 8080)))