diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c17dae6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,72 @@
+*.rbc
+capybara-*.html
+.rspec
+/db/*.sqlite3
+/db/*.sqlite3-journal
+/db/*.sqlite3-[0-9]*
+/public/system
+/coverage/
+/spec/tmp
+*.orig
+rerun.txt
+pickle-email-*.html
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# TODO Comment out this rule if you are OK with secrets being uploaded to the repo
+config/initializers/secret_token.rb
+config/master.key
+
+# Only include if you have production secrets in this file, which is no longer a Rails default
+# config/secrets.yml
+
+# dotenv, dotenv-rails
+# TODO Comment out these rules if environment variables can be committed
+.env
+.env*.local
+
+## Environment normalization:
+/.bundle
+/vendor/bundle
+
+# these should all be checked in to normalize the environment:
+# Gemfile.lock, .ruby-version, .ruby-gemset
+
+# unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
+.rvmrc
+
+# if using bower-rails ignore default bower_components path bower.json files
+/vendor/assets/bower_components
+*.bowerrc
+bower.json
+
+# Ignore pow environment settings
+.powenv
+
+# Ignore Byebug command history file.
+.byebug_history
+
+# Ignore node_modules
+node_modules/
+
+# Ignore precompiled javascript packs
+/public/packs
+/public/packs-test
+/public/assets
+
+# Ignore yarn files
+/yarn-error.log
+yarn-debug.log*
+.yarn-integrity
+
+# Ignore uploaded files in development
+/storage/*
+!/storage/.keep
+/public/uploads
+
+# Ignore VSCode settings
+/.vscode
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..38c4381
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2023 sk-ys
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d1780a9
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# redmine_wiki_text_colorizer
\ No newline at end of file