Fix wrong build context in gh action

Author: cbrnrd

.github/workflows/docker-image.yml

@@ -15,5 +15,5 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: Build the Base Docker image
-      run: docker build -t base:$(date +%s) .
+      run: docker build -t base:$(date +%s) ./server