Add spotify queue

tools/make_icons.py

@@ -16,7 +16,7 @@ for one job -- if you have librsvg to hand, this does the same:
 
     rsvg-convert -w 512 -h 512 --background-color '#0a0d14' static/logo.svg -o static/icon-512.png
 
-Otherwise: pip install playwright && playwright install chromium
+Otherwise: pip install -r requirements-dev.txt && playwright install chromium
 """
 
 import sys
@@ -42,7 +42,7 @@ def main():
     try:
         from playwright.sync_api import sync_playwright
     except ImportError:
-        sys.exit("needs playwright: pip install playwright && playwright install chromium")
+        sys.exit("needs playwright: pip install -r requirements-dev.txt && playwright install chromium")
 
     if not LOGO.exists():
         sys.exit(f"no logo at {LOGO}")