ci: fix missing npm deps and add javascript ci (#3910)

Description
---

- adds back some missing npm dev dependencies 
- adds javascript CI to check launchpad gui, tari collectibles web app, and lint/fmt for tari_explorer
- formatted tari explorer .hbs files with prettier

.github/workflows/base_node_binaries.yml

@@ -141,13 +141,13 @@ jobs:
       - name: Compile launchpad GUI
         run: |
           cd applications/launchpad/gui-vue
-          npm install
+          npm ci
           npm run build
 
       - name: Compile collectibles GUI
         run: |
           cd applications/tari_collectibles/web-app
-          npm install
+          npm ci
           npm run build
 
       - name: Info - Pre-Compile Space Check for Nix

.github/workflows/ci.yml

@@ -139,6 +139,28 @@ jobs:
         with:
           command: check
           args: --release --package tari_wallet_ffi
+  javascript:
+    name: npm packages
+    runs-on: ubuntu-18.04
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: build launchpad gui-vue
+        run: |
+          cd applications/launchpad/gui-vue
+          npm ci
+          npm run build
+      - name: build collectibles web-app
+        run: |
+          cd applications/tari_collectibles/web-app
+          npm ci
+          npm run build
+      - name: lint/fmt tari explorer
+        run: |
+          cd applications/tari_explorer
+          npm ci
+          npm run lint
+          npm run check-fmt
   test:
     name: test
     runs-on: ubuntu-18.04