added deployment guide

DEPLOYMENT.md

+# Step by Step deployment guide
+
+- [ ] Make sure that the master branch is clean and all commits are pushed to origin
+- [ ] `git checkout stable`
+- [ ] `git merge --no-ff master`
+- [ ] Make sure that the stable branch is clean and all commits are pushed to origin
+- [ ] `git checkout production`
+- [ ] `git checkout $HASHID -- .`
+      The $HASHID being the commit were the last merge from stable happened (before clarindev2clarin.sh changes were committed)
+- [ ] `git merge --no-ff stable`
+- [ ] Change the version number and the registry branch of the images in all deployment yaml files
+- [ ] `git add kubernetes/*deploy*yaml`
+- [ ] `git commit`
+- [ ] `git tag -a $VERSION_NUMBER -s -u $GPG_ID_HASH`
+- [ ] `git push --all
+- [ ] `git push --tags`
+- [ ] `cd dockerfiles`
+- [ ] `./release $VERSION_NUMBER production`
+- [ ] `cd ../kubernetes`
+- [ ] `./stop_kube.sh`
+- [ ] `./start_kube.sh`
+- [ ] `git checkout master`