add container healthcheck

Dockerfile

@@ -7,9 +7,13 @@ COPY README.md README.md
 COPY requirements.txt requirements.txt
 COPY LICENSE LICENSE
 
+RUN apk add --no-cache curl
+
 RUN python -m pip install --upgrade pip
 RUN python -m pip install --no-cache-dir -r requirements.txt
 
 CMD ["python", "src/main.py"]
 
+HEALTHCHECK --interval=1m --timeout=30s --start-period=10s --retries=3 CMD curl -f http://localhost:80 || exit 1
+
 EXPOSE 80

src/main.py

@@ -45,10 +45,6 @@ if not config.artifact_names:
 
 app = Flask(__name__, template_folder='templates')
 
-@app.route('/')
-def index():
-    return render_template('404.html')
-
 async def fetch_tasks():
     url = f'{config.base_url}/api/v1/repos/{config.user}/{config.repo}/actions/tasks'
     headers = {
@@ -91,6 +87,10 @@ for artifact_name in config.artifact_names:
     endpoint = f'handle_{artifact_name}'
     app.add_url_rule(route, view_func=create_handle_artifact(artifact_name), endpoint=endpoint)
 
+@app.route('/')
+def index():
+    return render_template('index.html', artifact_urls=[f'/{artifact_name}/GalacticFactory' for artifact_name in config.artifact_names])
+
 def handle_sigterm(*args):
     print("Received SIGTERM, exiting gracefully...")
     sys.exit(0)

src/templates/index.html

@@ -0,0 +1,10 @@
+{% block body %}
+  <h1>GalacticFactory Downloader</h1>
+  <p>Welcome to the download site for the GalacticFactory modpack!</p>
+  <p>The links below link to the available artifacts:</p>
+    <ul>
+        {% for artifact_url in artifact_urls %}
+            <li><a href="{{ artifact_url }}">{{ artifact_url }}</a></li>
+        {% endfor %}
+    </ul>
+{% endblock %}