Installation-manual.md

+## Ruby
+
+Example with [rvm](https://rvm.io/) (other solutions : rbenv, packages..):
+
+```sh
+rvm install 2.3.5
+```
+
+Nokogiri on macOS
+
+http://www.nokogiri.org/tutorials/installing_nokogiri.html tells us that `xz` can cause troubles, here is what to do
+
+```
+brew unlink xz
+gem install nokogiri # or bundle install
+brew link xz
+```
+
+
+## Node and Yarn
+
+Yarn needs node. If you use Node Version Manager [NVM](https://github.com/creationix/nvm)  you can rely on the content of `.nvmrc`. Otherwise please make sure to use a compatible version, still best to use the same as indicated by `.nvrmc`.
+
+* Install node
+
+```sh
+nvm install 6.13.0
+```
+
+* Install [yarn](https://yarnpkg.com/lang/en/docs/install/)
+
+```sh
+// On macOS
+brew install yarn
+
+// On Debian/ubuntu
+curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt-get update && sudo apt-get install yarn
+```
+
+* Install nodes packages
+
+```sh
+yarn install
+```
+
+## Postgres
+
+### Create user
+
+      createuser -s -U $USER -P chouette
+                  ^    ^      ^
+                  |    |      +---- prompt for passwd
+                  |    +----- as your default postgres user (remove in case of different config)
+                  +---------- superuser
+
+When promted for the password enter the highly secure string `chouette`.
+
+## Rails
+
+### Dependencies
+
+As documented [here](https://github.com/dryade/georuby-ext/issues/2) we need some more libs before we can start the `rake` setup tasks.
+
+On mac/OS :
+
+```sh
+brew install postgis
+```
+
+On debian/ubuntu system :
+
+```sh
+sudo apt-get install libproj-dev postgis
+```
+
+### Install gems
+
+Add the bundler gem
+
+```sh
+gem install bundler
+```
+
+Go into your local repository and install the gems
+
+```sh
+bundle install
+```
+
+### Database
+
+#### Create database
+
+```sh
+bundle exec rake db:create db:migrate
+```
+
+#### Use seed
+
+Run :
+
+```sh
+bundle exec rake db:seed
+```
+
+### Run
+
+Launch Sidekiq
+
+```sh
+bundle exec sidekiq
+```
+
+```sh
+bin/webpack-dev-server // Launch webpack server to compile assets on the fly
+bundle exec rails server // Launch rails server
+```
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