feat(iac): establish Ansible baseline for Nginx, SearXNG, Valkey, and Certbot

- Reverse-engineer live Debian 13 (trixie) VPS state at miguelpedro.xyz.br
- Add modular Ansible roles: common, certbot, valkey, searxng, and nginx
- Encrypt SearXNG secret_key using ansible-vault in group_vars/all/vault.yml
- Cleanly remove unused example.com Nginx stub symlink (sites-enabled/miguelpedro.xyz.br)
- Scaffold cgit + fcgiwrap role (cgit_enabled: false) for upcoming deployment
- Add DISCOVERY_REPORT.md, COMMAND_LOG.md, README.md, and AGENT_INSTRUCTIONS.md with Self-Updating Protocol

1 files changed, 78 insertions, 0 deletions

diff --git a/roles/searxng/templates/uwsgi-searxng.ini.j2 b/roles/searxng/templates/uwsgi-searxng.ini.j2
new file mode 100644
index 0000000..87e333f
--- /dev/null
+++ b/roles/searxng/templates/uwsgi-searxng.ini.j2
@@ -0,0 +1,78 @@
+# -*- mode: conf; coding: utf-8  -*-
+[uwsgi]
+
+# uWSGI core
+# ----------
+#
+# https://uwsgi-docs.readthedocs.io/en/latest/Options.html#uwsgi-core
+
+# Who will run the code / Hint: in emperor-tyrant mode uid & gid setting will be
+# ignored [1].  Mode emperor-tyrant is the default on fedora (/etc/uwsgi.ini).
+#
+# [1] https://uwsgi-docs.readthedocs.io/en/latest/Emperor.html#tyrant-mode-secure-multi-user-hosting
+#
+uid = {{ searxng_user }}
+gid = {{ searxng_group }}
+
+# set (python) default encoding UTF-8
+env = LANG=C.UTF-8
+env = LANGUAGE=C.UTF-8
+env = LC_ALL=C.UTF-8
+
+# chdir to specified directory before apps loading
+chdir = {{ searxng_src_dir }}/searx
+
+# SearXNG configuration (settings.yml)
+env = SEARXNG_SETTINGS_PATH=/etc/searxng/settings.yml
+
+# disable logging for privacy
+disable-logging = true
+
+# The right granted on the created socket
+chmod-socket = 666
+
+# Plugin to use and interpreter config
+single-interpreter = true
+
+# enable master process
+master = true
+
+# load apps in each worker instead of the master
+lazy-apps = true
+
+# load uWSGI plugins
+plugin = python3,http
+
+# By default the Python plugin does not initialize the GIL.  This means your
+# app-generated threads will not run.  If you need threads, remember to enable
+# them with enable-threads.  Running uWSGI in multithreading mode (with the
+# threads options) will automatically enable threading support. This *strange*
+# default behaviour is for performance reasons.
+enable-threads = true
+
+# Number of workers (usually CPU count)
+workers = %k
+threads = 4
+
+# plugin: python
+# --------------
+#
+# https://uwsgi-docs.readthedocs.io/en/latest/Options.html#plugin-python
+
+# load a WSGI module
+module = searx.webapp
+
+# set PYTHONHOME/virtualenv
+virtualenv = {{ searxng_venv_dir }}
+
+# add directory (or glob) to pythonpath
+pythonpath = {{ searxng_src_dir }}
+
+
+# speak to upstream
+# -----------------
+
+socket = {{ searxng_socket_path }}
+buffer-size = 8192
+
+offload-threads = %k