Try replacing Travis with Github Actions

.github/workflows/scala.yml

@@ -0,0 +1,47 @@
+name: Exam
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: postgres
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 21
+      uses: actions/setup-java@v2
+      with:
+        java-version: 1.21
+        distribution: temurin
+    - uses: actions/checkout@v4
+    - name: Set up Node 18
+      uses: actions/setup-node@v4
+      with:
+        node-version: 18.x
+    - name: Create database user
+      run: psql -c "CREATE USER sitnet WITH PASSWORD 'sitnetsitnet';" -U postgres
+    - name: Create database
+      run: psql -c 'CREATE DATABASE sitnet_test WITH OWNER 'sitnet';' -U postgres
+    - name: Move to UI directory
+      run: cd ui
+    - name: Clean node_modules
+      run: rm -rf node_modules
+    - name: Install dependencies
+      run: npm i
+    - name: Check format
+      run: npm run check-format
+    - name: Lint
+      run: npm run check-lint
+    - name: Build production bundle
+      run: npm run build
+    - name: Move back to root
+      run: cd ..
+    - name: Run tests
+      run: sbt test
+
+