Use `npm ci` in CI

So there is no attempt to update the lock file.

.github/workflows/examples-ci.yml

@@ -44,9 +44,9 @@ jobs:
           path: ~/.npm
           key: examples-node-v1-${{ hashFiles('**/package-lock.json') }}
 
-      - name: (npm) ${{ matrix.example }} install using npm i
+      - name: (npm) ${{ matrix.example }} install using npm ci
         if: steps.use-yarn.outputs.lockfile != 'yarn.lock'
-        run: npm install
+        run: npm ci
         working-directory: examples/${{ matrix.example }}
 
       - name: (npm) ${{ matrix.example }} test

ci/Jenkinsfile.gh-pages

@@ -19,7 +19,7 @@ pipeline {
   stages {
     stage('Deps') {
       steps {
-        sh 'npm install'
+        sh 'npm ci'
       }
     }
 
@@ -64,7 +64,7 @@ pipeline {
 def buildExample(example=STAGE_NAME) {
   def dest = "${WORKSPACE}/build/docs/examples/${example}"
   dir("examples/${example}") {
-    sh 'npm install'
+    sh 'npm ci'
     sh 'npm run build'
     sh "mkdir -p ${dest}"
     sh "cp -r build/. ${dest}"

package.json

@@ -38,7 +38,7 @@
     "pretest": "run-s pretest:*",
     "pretest:1-init-git-submodules": "[ -f './nim-waku/build/wakunode2' ] || git submodule update --init --recursive",
     "pretest:2-build-nim-waku": "[ -f './nim-waku/build/wakunode2' ] || run-s nim-waku:build",
-    "examples:pretest": "for d in examples/*/; do (cd $d && npm install); done",
+    "examples:pretest": "for d in examples/*/; do (cd $d && npm ci); done",
     "nim-waku:build": "(cd nim-waku; NIMFLAGS=\"-d:chronicles_colors=off -d:chronicles_sinks=textlines -d:chronicles_log_level=TRACE\" make -j$(nproc --all 2>/dev/null || echo 2) wakunode2)",
     "nim-waku:force-build": "(cd nim-waku && rm -rf ./build/ ./vendor && make -j$(nproc --all 2>/dev/null || echo 2) update) && run-s nim-waku:build",
     "test": "run-s test:*",