feat: move to new CI flow (#518)

* feat: move to new CI flow

Co-Authored-By: Joschka <joschka@users.noreply.github.com>

* fix(ci): run on push & PRs
Co-authored-by: Joschka de Cuveland <joschka.decuveland@digitalservice.bund.de>

* fix(ci): checkout before running local action\n\nCo-authored-by: Joschka de Cuveland <joschka.decuveland@digitalservice.bund.de>

* fix(content release): always run on workflow trigger

* fix(content release): use new content file

* fix(docker.sh): fix function returns

* feat(Dockerfile): use npm ci & leaner app image

* feat(docker.sh): add --appFromImage & e2e test on content deploy

* fix(ci): typo

* feat(contentDeploy): install repo if latest app image fails

* fix(ci): correctly check step outcome

* feat(docker): add hashes to image labels, deploy correct prod tag

Co-Authored-By: Pram Gurusinga <9930966+pgurusinga@users.noreply.github.com>

* fix(contentDeploy): use local content for hash

Co-Authored-By: Pram Gurusinga <9930966+pgurusinga@users.noreply.github.com>

---------

Co-authored-by: Joschka <joschka@users.noreply.github.com>
Co-authored-by: Pram Gurusinga <9930966+pgurusinga@users.noreply.github.com>

.github/actions/cached-checkout-install/action.yml

@@ -0,0 +1,29 @@
+name: "Cached Checkout & Install"
+description: "Checks out repository, downloads node, caches node_modules and installs project"
+runs:
+  using: "composite"
+  steps:
+    - name: Setup Node
+      uses: actions/setup-node@v4
+      with:
+        node-version: "20.x"
+        cache: "npm"
+    - name: Cache node modules
+      id: cache-npm
+      uses: actions/cache@v3
+      env:
+        cache-name: cache-node-modules
+      with:
+        path: ~/.npm
+        key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+        restore-keys: |
+          ${{ runner.os }}-build-${{ env.cache-name }}-
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
+    - if: ${{ steps.cache-npm.outputs.cache-hit != 'true' }}
+      name: List the state of node modules
+      continue-on-error: true
+      run: npm list
+      shell: bash
+    - run: npm ci
+      shell: bash