[CI] use zmkfirmware/zmk-build-arm:stable

.gitea/workflows/build.yml

@@ -6,7 +6,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     container:
-      image: ghcr.io/bcdevices/zephyr:latest
+      image: zmkfirmware/zmk-build-arm:stable
     name: Build
     steps:
       - name: Install Dependencies
@@ -19,13 +19,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
-      - name: Link Directories
-        run: |
-          ln -s /usr/src/zephyr-3.4.0/modules modules
-          ln -s /usr/src/zephyr-3.4.0/tools tools
-          ln -s /usr/src/zephyr-3.4.0/zephyr zephyr
-          ln -s /usr/src/zephyr-3.4.0/bootloader bootloader
-
       - name: Hash west modules
         id: hash-west
         run: |
@@ -88,3 +81,12 @@ jobs:
         with:
           path: firmware.zip
           name: firmware.zip
+
+      - name: Hash west modules
+        id: hash-west
+        run: |
+          FILE_PATH=zephyr/west.yml
+          FILES=$(find . -name build.yml -o -name west.yml -type f -exec sha256sum \; | sort)
+          HASH="$(echo -n $FILES | sha256sum | head -c 64)"
+          echo "hash=$HASH" >> "$GITHUB_OUTPUT"
+          echo "computed hash: $HASH"