Add documentation files

Added mandatory documentation files for the RIC Amber release.

Change-Id: I8d2b1a9ca9bd01f18082e338cbfd2e044c96b334
Signed-off-by: Timo Tietavainen <timo.tietavainen@nokia.com>
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..c86cfdf
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,30 @@
+# documentation only
+[tox]
+minversion = 2.0
+envlist =
+    docs,
+    docs-linkcheck,
+skipsdist = true
+
+[testenv:docs]
+basepython = python3
+deps =
+    sphinx
+    sphinx-rtd-theme
+    sphinxcontrib-httpdomain
+    recommonmark
+    lfdocs-conf
+
+commands =
+    sphinx-build -W -b html -n -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/html
+    echo "Generated docs available in {toxinidir}/docs/_build/html"
+whitelist_externals = echo
+
+[testenv:docs-linkcheck]
+basepython = python3
+deps = sphinx
+       sphinx-rtd-theme
+       sphinxcontrib-httpdomain
+       recommonmark
+       lfdocs-conf
+commands = sphinx-build -W -b linkcheck -d {envtmpdir}/doctrees ./docs/ {toxinidir}/docs/_build/linkcheck