Add notes about websockets

internal_filesystem/apps/com.example.btcticker/assets/echo.py

@@ -1,5 +1,8 @@
+# example from https://github.com/micropython/micropython-lib/blob/master/python-ecosys/aiohttp/examples/ws.py
+# works with:
 # import mip
-# mip.install(aiohttp)
+# mip.install("aiohttp")
+# but only on esp32 target, not unix?!
 
 import sys
 import ssl

internal_filesystem/lib/README.md

@@ -5,3 +5,5 @@ This /lib folder contains:
 - mip.install('github:jonnor/micropython-zipfile')
 - mip.install("shutil") for shutil.rmtree('/apps/com.example.files') # for rmtree()
 
+- maybe mip.install("aiohttp") # easy websockets
+- maybe mip.install("base64") # for nostr etc