Create CI.

.github/workflows/docker-image.yml

@@ -0,0 +1,25 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: [ "main" ]
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Write .env file
+      run: echo "${{secrets.FRONTEND_DOT_ENV}}" > ./frontend/.env
+    - name: Login Dockerhub
+      env:
+        DOCKER_USERNAME: ${{secrets.DOCKER_USERNAME}}
+        DOCKER_PASSWORD: ${{secrets.DOCKER_PASSWORD}}
+      run: echo $DOCKER_PASSWORD | docker login -u $DOCKER_USERNAME --password-stdin
+    - name: Build the Docker image
+      run: docker build -t jamesmurdza/sandbox .
+    - name: Push to Dockerhub
+      run: docker push jamesmurdza/sandbox:latest