Add application file

Dockerfile

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+FROM python:3.11-slim
+WORKDIR /app
+COPY . .
+RUN pip install flask
+EXPOSE 7860
+CMD ["flask", "run", "--host=0.0.0.0", "--port=7860"]

app.py

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+from flask import Flask, request, jsonify
+import random
+
+app = Flask(__name__)
+
+URLS = [
+    "https://example1.com",
+    "https://example2.com",
+    "https://example3.com",
+]
+
+
+@app.route("/")
+def get_url():
+    failed = request.args.get("failed")
+
+    urls = URLS.copy()
+
+    if not urls:
+        return jsonify({"error": "URL list is empty"})
+
+    if failed:
+        urls = [u for u in urls if u != failed]
+
+    if not urls:
+        return jsonify({"error": "No URLs remaining after filtering"})
+
+    return jsonify({"url": random.choice(urls)})

requirements.txt

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+flask
+jsonify