GH actions + finish

.github/workflows/gui-build.yml

@@ -0,0 +1,34 @@
+name: Build + Lint
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./theseus_gui
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+      - name: Get yarn cache
+        id: yarn-cache
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+      - uses: actions/cache@v3
+        with:
+          path: ${{ steps.yarn-cache.outputs.dir }}
+          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-yarn-
+      - name: Install dependencies
+        run: yarn install --immutable --immutable-cache --check-cache
+      - name: Run Lint
+        run: npm run lint
+      - name: Build
+        run: npm run build