feat(relay): add custom workflow

.github/workflows/custom_build.yml

@@ -0,0 +1,36 @@
+name: Binary Custom Release Build
+
+on: workflow_dispatch
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  linux:
+    name: Linux
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Build in Docker
+        run: |
+          # Get the latest stable rust toolchain version available
+          TOOLCHAIN=$(curl -s 'https://static.rust-lang.org/dist/channel-rust-stable.toml' | awk '/\[pkg.rust\]/ {getline;print;}' | sed -r 's/^version = "([0-9.]+) .*/\1/')
+          scripts/docker-build-linux.sh "$TOOLCHAIN"
+        env:
+          BUILD_ARCH: x86_64
+          RELAY_FEATURES:
+
+      - name: Bundle Debug File
+        run: |
+          cd target/x86_64-unknown-linux-gnu/release/
+          zip relay-Linux-x86_64-debug.zip relay.debug
+          mv relay relay-Linux-x86_64
+
+      - uses: actions/upload-artifact@v3
+        with:
+          name: ${{ github.sha }}
+          path: target/x86_64-unknown-linux-gnu/release/relay-Linux-x86_64*