Improve JSON validation in start-proxy action
#5039
| Job | Run time |
|---|---|
| 3m 35s | |
| 5m 57s | |
| 1m 29s | |
| 1m 37s | |
| 1m 12s | |
| 4m 13s | |
| 1m 31s | |
| 1m 21s | |
| 1m 25s | |
| 4m 24s | |
| 7m 52s | |
| 4m 11s | |
| 4m 46s | |
| 4m 15s | |
| 1m 12s | |
| 1m 14s | |
| 50m 14s |