added test action

.forgejo/workflows/build_linux.yaml

@@ -1,10 +1,19 @@
 name: Build for Linux
-
+env:
+  BUILD_DEPS: git nim nimble
 on: [push]
 jobs:
   test-build:
     runs-on: docker
     steps:
-      - name: Checkouter
+      - name: Install Dependencies
-        uses: pswilde/norgbackup
+        run: |
+          apt update && apt install --yes $BUILD_DEPS
+      - name: Clone repo
+        run: |
+          git clone ${{ github.ref_name }} ${{ github.server_url }}/${{ github.repository }}
+      - name: Build
+        run: |
+          cd app
+          nimble build --release