Testing an APT repository

Question

I am trying to setup a distribution mechanism for Raspbian (Raspberry Pi) on a Ubuntu server. I have read most of the posts here and articles I could find about setting up an APT repo. I don't know if it works (I am pretty sure it does not as I get an error on the RPi side)... Debugging is not obvious.

Here are my questions / issues:

1. I need packages. I have not done one by myself yet. I found some chromium packages and try to install them via mini-dinstall. It would be great to "see" something but they are still in the incoming directory. Having a complete directory structure would be useful. Where can I find a set of packages (let's say 2-3) that are not in the main repositories (kind of the hello world of package)?

2. If I am not mistaken, the server itself is just a plain ol' Apache, which we all love. Right? No modules? Mine is here: (do you see anything wrong?)

   http://packator0.makenator.com/archive
   

3. The webserver should also distribute your GPG public key, right? Mine is here.

   http://packator0.makenator.com/archive/makenator-archive-keyring/makenator-archive-keyring.gpg
   

4. The client should have a list of repo:

   deb http:// packator0.makenator.com/archive stable/all/
   deb http:// packator0.makenator.com/archive unstable/all/
   

5. The client should learn about the public key:

   gpg --keyserver http:// packator0.makenator.com/archive/makenator-archive-keyring/makenator-archive-keyring.gpg --recv 1EFBD9A7AEA2C37C
   

   but I get:

   gpg: requesting key AEA2C37C from http server packator0.makenator.com
   gpg: /home/pi/.gnupg/trustdb.gpg: trustdb created
   gpg: key AEA2C37C: public key "[information is ok, just removed it here]" imported
   gpg: key 1BCD4B6B: rejected by import filter
   gpg: Total number processed: 2
   gpg:               imported: 1  (RSA: 1)
   

6. And of course, when I run apt-get update on the RPi, I get (error is on the last line):

   Ign http:// packator0.makenator.com stable/all/ InRelease                                  
   Ign http:// packator0.makenator.com unstable/all/ InRelease                                
   Ign http:// packator0.makenator.com stable/all/ Release.gpg                                                                          
   ...
   Get:1 http:// packator0.makenator.com unstable/all/ Release.gpg [287 B]  
   Hit http:// packator0.makenator.com stable/all/ Release                                         
   Hit http:// archive.raspberrypi.org jessie/main armhf Packages                                  
   Hit http:// packator0.makenator.com unstable/all/ Release                                                      
   Ign http:// packator0.makenator.com unstable/all/ Release                                                                           
   Hit http:// packator0.makenator.com stable/all/ Packages                                                                            
   ...
   Hit http:// packator0.makenator.com unstable/all/ Packages                                                  
   ...
   Ign http:// packator0.makenator.com stable/all/ Translation-en_US                         
   Ign http:// packator0.makenator.com stable/all/ Translation-en                            
   Ign http:// packator0.makenator.com unstable/all/ Translation-en_US                       
   Ign http:// packator0.makenator.com unstable/all/ Translation-en                          
   ...
   Fetched 287 B in 6s (42 B/s)                                                                                                                                                                                                                                                 
   Reading package lists... Done
   W: GPG error: http:// packator0.makenator.com unstable/all/ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1EFBD9A7AEA2C37C
   

Thanks for your help. Partial answers are really good too!

(because I am new here, I could not post too many links, hence the space in the URL)