Add healthcheck to docker

Author: JanisV

Dockerfile

@@ -24,4 +24,12 @@ COPY --from=build-stage /app/frontend/dist /app/static
 
 EXPOSE 8000
 
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+  CMD python3 -c 'import urllib.request; \
+      try: \
+          res = urllib.request.urlopen("http://localhost:8000/api/version", timeout=3); \
+          exit(0) if res.status == 200 else exit(1) \
+      except: \
+          exit(1)'
+
 CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]