ci: wait for server to be ready instead of sleeping

Author: tazlin

.github/workflows/maintests.yml

@@ -74,7 +74,7 @@ jobs:
         run: |
           python -m pip install -r requirements.txt -r requirements.dev.txt
           python server.py -vvvvi --horde stable &
-          sleep 5
+          for i in $(seq 1 30); do curl -sf http://localhost:7001/ > /dev/null && break; echo "Waiting for server… ($i)"; sleep 2; done
 
           curl -X POST --data-raw 'username=test_user' http://localhost:7001/register | grep -Po '<code class="ah-api-key">\K[^<]*(?=</code>)' > tests/apikey.txt
           export AI_HORDE_DEV_APIKEY=$(cat tests/apikey.txt)

.github/workflows/prtests.yml

@@ -97,7 +97,7 @@ jobs:
         run: |
           python -m pip install -r requirements.txt -r requirements.dev.txt
           python server.py -vvvvi --horde stable &
-          sleep 5
+          for i in $(seq 1 30); do curl -sf http://localhost:7001/ > /dev/null && break; echo "Waiting for server… ($i)"; sleep 2; done
 
           curl -X POST --data-raw 'username=test_user' http://localhost:7001/register | grep -Po '<code class="ah-api-key">\K[^<]*(?=</code>)' > tests/apikey.txt
           export AI_HORDE_DEV_APIKEY=$(cat tests/apikey.txt)