Add CI workflow

.github/workflows/ci.yml

@@ -0,0 +1,46 @@
+name: CI
+
+on: [push]
+
+jobs:
+  build:
+    name: Continuous Integration
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Check translation files
+        run: |
+          scripts/translations/sort.sh
+          scripts/translations/missing-keys.sh
+
+      - name: Build neo4j image
+        uses: docker/build-push-action@v1.1.0
+        with:
+          repository: humanconnection/neo4j
+          tags: latest
+          path: neo4j/
+          push: false
+      - name: Build backend base image
+        uses: docker/build-push-action@v1.1.0
+        with:
+          repository: humanconnection/backend
+          tags: build-and-test
+          target: build-and-test
+          path: backend/
+          push: false
+      - name: Build webapp base image
+        uses: docker/build-push-action@v1.1.0
+        with:
+          repository: humanconnection/webapp
+          tags: build-and-test
+          target: build-and-test
+          path: webapp/
+          push: false
+
+      - name: Lint backend
+        run: docker run --rm humanconnection/backend:latest yarn run lint
+      - name: Lint webapp
+        run: docker run --rm humanconnection/webapp:latest yarn run lint
+