ci: build & publish a static binary too

Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>

.forgejo/workflows/build.yaml

@@ -19,7 +19,7 @@ on:
       - 'templates/**'
 
 jobs:
-  build:
+  binary:
     runs-on: nixos-latest
     steps:
       - name: checkout
@@ -36,6 +36,57 @@ jobs:
           logs: true
           package: iocaine
 
+  binary-static:
+    runs-on: nixos-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: setup magic attic cache
+        uses: actions/magic-attic-cache@main
+        with:
+          ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}
+
+      - name: build
+        uses: actions/nix/build@main
+        with:
+          logs: true
+          package: iocaine-static
+
+      - name: compress the binary
+        uses: actions/nix/develop@main
+        with:
+          run: |
+            zstd result/bin/iocaine
+
+      - name: determine the version
+        uses: actions/nix/develop@main
+        id: ver
+        with:
+          run: |
+            echo "ver=$(cargo info -q iocaine | grep "^version:" | cut -d " " -f 2)" >>"${GITHUB_OUTPUT}""
+
+      - name: upload package
+        uses: actions/nix/develop@main
+        with:
+          run: |
+            curl --user :${{ secrets.DOCKER_PASSWORD }} -XDELETE \
+                 https://git.madhouse-project.org/api/packages/algernon/generic/iocaine/${{ steps.ver.outputs.ver }}
+            curl --user :${{ secrets.DOCKER_PASSWORD }} \
+                 --upload-file result/bin/iocaine.zstd \
+                 https://git.madhouse-project.org/api/packages/algernon/generic/iocaine/${{ steps.ver.outputs.ver }}/iocaine.zstd
+
+  container:
+    runs-on: nixos-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+
+      - name: setup magic attic cache
+        uses: actions/magic-attic-cache@main
+        with:
+          ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}
+
       - name: build the container image
         uses: actions/nix/build@main
         with: