ci: link deltachat-rpc-server statically on Linux

.github/workflows/deltachat-rpc-server.yml

@@ -6,17 +6,37 @@ on:
   workflow_dispatch:
 
 jobs:
-  build_server:
-    name: Build deltachat-rpc-server
+  # Build a version statically linked against musl libc
+  # to avoid problems with glibc version incompatibility.
+  build_static_linux:
+    name: Build deltachat-rpc-server for Linux
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup rust target
+        run: rustup target add x86_64-unknown-linux-musl
+
+      - name: Install musl-gcc
+        run: sudo apt install musl-tools
+
+      - name: Build
+        env:
+          RUSTFLAGS: "-C link-arg=-s"
+        run: cargo build --release --target x86_64-unknown-linux-musl -p deltachat-rpc-server --features vendored
+      - name: Upload binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: deltachat-rpc-server
+          path: target/x86_64-unknown-linux-musl/release/deltachat-rpc-server
+          if-no-files-found: error
+
+  build_windows:
+    name: Build deltachat-rpc-server for Windows
     strategy:
       fail-fast: false
       matrix:
         include:
-          - os: ubuntu-22.04
-            artifact: gnu-linux-x86_64
-            path: deltachat-rpc-server
-            target: x86_64-unknown-linux-gnu
-
           - os: windows-latest
             artifact: win32.exe
             path: deltachat-rpc-server.exe