Fix docs

apt-publisher/README

 First did instructions in --> INIT.TXT
 
+THEN, this is new:
+
+    gpg --output public.pgp --export 83345E54
+
+    // optional I guess; gpg --keyring ./public.pgp --no-default-keyring --export -a > public.asc
+
+    we need that public.pgp file!! let's upload it to somewhere, such as:
+
+    https://cppse.nl/public.pgp !!
+
+
 Then make sure you have an "empty" repo.
 
     reprepro -b /repo remove bionic whatever  # if needed
 Usage after all this:
 
     # install key
-    sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 5CE16B7B
+    ## THIS NO LONGER WORKS sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 5CE16B7B
 
     # install repo
-    sudo add-apt-repository "deb https://cppse.nl/repo/ $(lsb_release -cs) main"
+    ## THIS NO LONGER WORKS sudo add-apt-repository "deb https://cppse.nl/repo/ $(lsb_release -cs) main"
+
+    # NEW APPROACH:
+    curl -qs https://cppse.nl/public.pgp | sudo tee /etc/apt/keyrings/public.pgp
+    echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/public.pgp] https://cppse.nl/repo/ $(lsb_release -cs) main" | sudo tee -a /etc/apt/sources.list
+
 
     # enjoy
     sudo apt-get install whatever