Update RTD config (#164)

Author: ssbarnea

.gitignore

@@ -128,3 +128,4 @@ dmypy.json
 .pyre/
 *.rpm
 src/subprocess_tee/_version.py
+_readthedocs

.readthedocs.yml

@@ -0,0 +1,25 @@
+---
+version: 2
+
+mkdocs:
+  fail_on_warning: true
+  configuration: mkdocs.yml
+
+build:
+  os: ubuntu-24.04
+  tools:
+    python: "3.11"
+  commands:
+    - pip install --user tox
+    - python3 -m tox -e docs
+python:
+  install:
+    - method: pip
+      path: tox
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs
+submodules:
+  include: all
+  recursive: true

readthedocs.yml

@@ -4,6 +4,7 @@ min_version = 4.6.3
 env_list =
     lint
     pkg
+    docs
     deps
     py
     alpine
@@ -69,11 +70,17 @@ allowlist_externals =
     docker
 
 [testenv:docs]
-description = Build docs
+description = Builds docs
+package = editable
+skip_install = false
 extras =
     docs
+set_env =
+    DYLD_FALLBACK_LIBRARY_PATH = /opt/homebrew/lib:{env:LD_LIBRARY_PATH}
+    NO_COLOR = 1
+    TERM = dump
 commands =
-    mkdocs build --strict
+    mkdocs {posargs:build --strict --site-dir=_readthedocs/html/}
 
 [testenv:lint]
 description = Run all linters