Add "Notes for the nerds" section to wiki.md

This patch is provided to Tilde.club under the terms of
GNU General Public License, any version
published by the Free Software Foundation.

wiki/source/wiki.md

@@ -83,3 +83,83 @@ You can do this right from the Github GUI!
 
 Ask on irc if you have questions!
 
+## Notes for the nerds
+
+Following is technical information about Tilde.club website code repository
+(which contains Tilde.club wiki),
+for any of you who won't settle for an easy way out,
+but would rather embark on a do-it-yourself journey
+of technological liberation...
+
+* The code of Tilde.club website (which includes the wiki)
+  is maintained using [Git version control system](https://git-scm.com/).
+* The master Git repository is available inside Tilde.club at <q>`/usr/share/nginx/html`</q> directory,
+  with read-only access to Tilde.club members.
+  In case you prefer to work on your edits directly inside Tilde.club,
+  run a command like this to clone the repository:
+  
+      git clone /usr/share/nginx/html tildeclub-site
+  
+  If you prefer to clone to your local machine via SSH instead,
+  use **one** of the following commands:
+  
+      git clone ssh://USERNAME@tilde.club/usr/share/nginx/html tildeclub-site
+      git clone USERNAME@tilde.club:/usr/share/nginx/html tildeclub-site
+  
+  * Don't forget to substitute <var>USERNAME</var> with your Tilde.club username
+    (else SSH would fail logging you in for the access).
+  * The first command works even with a very old Git version.
+  
+  Note that you cannot issue <q>`git push`</q> from a repository cloned these ways
+  (but <q>`git pull`</q> will work like usual),
+  so it would be suitable mainly for email-based patch submission,
+  or your private experiment/exploration.
+* This Git repository is also officially available online at two places:
+  
+  * [GitHub](https://github.com/tildeclub/site/)
+    (requires JavaScript and latest browser to view)
+  * [Tildegit](https://tildegit.org/club/site/)
+    (read-only mirror,
+    replicates from GitHub;
+    do not need JavaScript to view)
+  
+  The <q>`git clone`</q> command also work directly with these URLs;
+  although note that pull requests are accepted only on GitHub.
+  If you prefer not to use GitHub,
+  email-based patch submission is also accepted.
+* Traditional email-based patch submission
+  is accepted on email address `root` at `tilde.club`.
+  If your patches require a use of <q>`--scissors`</q> option on <q>`git am`</q> command,
+  please explicitly mention that on each patch email.
+* The in-repository subdirectory that contains the actual wiki text
+  is <q>`wiki/source/`</q>.
+* Wiki articles are stored in that directory as individual files:
+  one file per article,
+  in [Pandoc Markdown format](https://pandoc.org/MANUAL.html#pandocs-markdown)
+  with [YAML metadata](https://pandoc.org/MANUAL.html#extension-yaml_metadata_block) frontmatter at the top,
+  bearing file extension <q>`.md`</q>.
+* The actual mechanism used
+  for rendering each Markdown files into actual HTML pages
+  on Tilde.club's website
+  (and text files on Tilde.club's Gopher site)
+  is specified in <q>`wiki/Makefile`</q> in the repository.
+  * The Gophermap of the wiki
+    is generated dynamically on Gopher request however;
+    see <q>`wiki/gophermap`</q> and <q>`wiki/txtlist.sh`</q> in the repository
+    for this part.
+* The copyright license of this repository is
+  [GNU General Public License](https://www.gnu.org/licenses/gpl.html),
+  _any version_
+  published by the [Free Software Foundation](https://www.fsf.org/);
+  as stated in <q>`LICENSE`</q> file on the repository,
+  while the _any version_ part comes from the fallback condition
+  specified in the section 14 of that license.
+  If you submit your work to be a part of this wiki,
+  this is the copyright license that your work would get published under.
+  
+  **Do not trust what GitHub says about the specifics
+  of licensing** on this repository
+  (or any other repository hosted there for that matter),
+  always check the <q>`README`</q>,
+  <q>`LICENSE`</q>,
+  and <q>`COPYING`</q> files for the fine prints.