Only build when target branch is main

.forgejo/workflows/docker.yml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches:
+      - main
+jobs:
+  docker:
+    name: docker build
+    runs-on: ubuntu-22.04
+    needs:
+      - test
+    steps:
+      - uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME}}
+          password: ${{ secrets.DOCKERHUB_TOKEN}}
+      - uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: karcsesz/fingerlink:latest
+      - uses: docker/build-push-action@v5
+        with:
+          push: true
+          tags: karcsesz/fingerlink:latest-nano
+          build-args: "editor=nano"

.forgejo/workflows/test.yml

@@ -7,22 +7,3 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/rust-toolchain@stable
       - run: cargo test --all-features
-  docker:
-    name: docker build
-    runs-on: ubuntu-22.04
-    needs:
-      - test
-    steps:
-      - uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME}}
-          password: ${{ secrets.DOCKERHUB_TOKEN}}
-      - uses: docker/build-push-action@v5
-        with:
-          push: false
-          tags: karcsesz/fingerlink:latest
-      - uses: docker/build-push-action@v5
-        with:
-          push: false
-          tags: karcsesz/fingerlink:latest-nano
-          build-args: "editor=nano"