build using custom docker image

.github/workflows/static_build.yml

@@ -8,24 +8,19 @@ jobs:
   test-release:
     name: Build for Linux
     runs-on: ubuntu-latest
-    container: 
-      image: ekidd/rust-musl-builder
-      volumes:
-        - ${{ github.workspace }}:/home/rust/src
     env:
       CARGO_TERM_COLOR: always
     steps:
       - uses: actions/checkout@main
       - name: Build-musl
         run: |
           echo "Building static binaries using ekidd/rust-musl-builder"
-          sudo chown rust -R /opt/rust/
-          rustup target add x86_64-unknown-linux-musl
-          RUSTFLAGS="-Clink-arg=-Wl,--allow-multiple-definition" cargo build --release --features=auth
-      - name: run fastn
-        run: ./target/x86_64-unknown-linux-musl/release/fastn --version
+          docker build -t fastn-build-image .
+          docker run -it --name fastn-build fastn-build-image
+          mkdir -p out
+          docker cp fastn-build:/home/rust/src/target/x86_64-unknown-linux-musl/release/fastn out/
       - name: ls files
         run: |
           ls target/
-          ls target/x86_64-unknown-linux-musl/release/fastn
-          file target/x86_64-unknown-linux-musl/release/fastn
+          ls out/
+          file out/fastn

Dockerfile

@@ -0,0 +1,7 @@
+FROM ekidd/rust-musl-builder
+
+# We need to add the source code to the image because `rust-musl-builder`
+# assumes a UID of 1000
+ADD --chown=rust:rust . ./
+
+CMD RUSTFLAGS="-Clink-arg=-Wl,--allow-multiple-definition" cargo build --release --features=auth