add sqlite backup support for cloudron

CloudronManifest.json

@@ -4,8 +4,8 @@
   "author": "Florian Heinz",
   "description": "Private Flask app for meals, shopping and gentle food planning",
   "tagline": "einfach essen planen",
-  "version": "0.2.2",
-  "upstreamVersion": "0.2.1",
+  "version": "0.2.3",
+  "upstreamVersion": "0.2.2",
   "healthCheckPath": "/",
   "httpPort": 8000,
   "manifestVersion": 2,

Dockerfile.cloudron

@@ -6,6 +6,9 @@ ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
     PIP_NO_CACHE_DIR=1
 
+RUN apt-get update && apt-get install -y --no-install-recommends sqlite3 \
+    && rm -rf /var/lib/apt/lists/*
+
 COPY requirements.txt /app/code/
 RUN pip install --no-cache-dir -r requirements.txt