for test script: add requirements, fix endpoint, and add setup instructions

requirements.txt

@@ -1,3 +1,4 @@
+eth_keys
 pywebview
 pyinstaller>=6.12.0
 # For development

test-scripts/check-did.sh

@@ -1,9 +1,10 @@
 #!/bin/bash
 
+# Requirements: jq, python, and `pip install -r requirements.txt`
 # Usage: ./check-did.sh [did]
 # If no DID provided, lists all visible DIDs
 
-API_URL=${ENDORSER_API_URL:-"https://test-api.endorser.ch/api/whichDidsICanSee"}
+API_URL=${ENDORSER_API_URL:-"https://test-api.endorser.ch/api"}
 ADMIN_DID="did:ethr:0x0000694B58C2cC69658993A90D3840C560f2F51F"
 ADMIN_KEY="2b6472c026ec2aa2c4235c994a63868fc9212d18b58f6cbfe861b52e71330f5b"