Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/ajv/scripts/travis-gh-pages

@@ -1,23 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-if [[ "$TRAVIS_BRANCH" == "master" && "$TRAVIS_PULL_REQUEST" == "false" && $TRAVIS_JOB_NUMBER =~ ".3" ]]; then
-  git diff --name-only $TRAVIS_COMMIT_RANGE | grep -qE '\.md$|^LICENSE$|travis-gh-pages$' && {
-    rm -rf ../gh-pages
-    git clone -b gh-pages --single-branch https://${GITHUB_TOKEN}@github.com/ajv-validator/ajv.git ../gh-pages
-    mkdir -p ../gh-pages/_source
-    cp *.md ../gh-pages/_source
-    cp LICENSE ../gh-pages/_source
-    currentDir=$(pwd)
-    cd ../gh-pages
-    $currentDir/node_modules/.bin/gh-pages-generator
-    # remove logo from README
-    sed -i -E "s/<img[^>]+ajv_logo[^>]+>//" index.md
-    git config user.email "$GIT_USER_EMAIL"
-    git config user.name "$GIT_USER_NAME"
-    git add .
-    git commit -am "updated by travis build #$TRAVIS_BUILD_NUMBER"
-    git push --quiet origin gh-pages > /dev/null 2>&1
-  }
-fi