gplugin/gplugin

Add a convey plan to build the docs and export them.

2021-08-24, Gary Kramlich
71f0a1891d24
Add a convey plan to build the docs and export them.

Also remove the old container images for the docs as the static pages will be pulled in via another CI task to build the whole site.

Testing Done:
Ran the plan locally a bunch.

Reviewed at https://reviews.imfreedom.org/r/904/
There are a few notes about building on OSX.
First off, building has *ONLY* been tested against homebrew. If you want to
support fink or macports, please let me know and I will merge your pull
request.
Currently there is no known way to build the Perl loader on MacOS. So you
**MUST** run meson with `-Dperl5=false`.
## Lua
For the Lua loader to work, you need to install `lgi` from luarocks either
systemwide for lua 5.1 as `lgi` does not currently work with lua 5.4 which is
the default in homebrew.
To make this work, you'll need to install both `lua@5.1` and `luarocks` via
`brew install lua@5.1 luarocks`. Once those are installed, you'll need to
create `/usr/local/etc/luarocks/config-5.1.lua` with the following contents.
```
-- LuaRocks configuration
rocks_trees = {
{ name = "user", root = home .. "/.luarocks" };
{ name = "system", root = "/usr/local" };
}
lua_interpreter = "lua5.1";
variables = {
LUA_DIR = "/usr/local/opt/lua@5.1";
LUA_BINDIR = "/usr/local/opt/lua@5.1/bin";
}
```
Once that is done, you can then finally install `lgi` with the following
command.
```
luarocks --lua-version=5.1 install lgi
```
## Python3
If you're using homebrew, you need to install `pygobject3`.