Add release.yml

.github/workflows/check.yml

@@ -1,4 +1,4 @@
-name: Check build, run tests & check formatting
+name: Check
 
 on: [push, pull_request]
 

.github/workflows/deb-ubuntu-20.04.yml

@@ -0,0 +1,30 @@
+name: Build DEB (Ubuntu 20.04)
+
+on: release
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+    - name: Build DEB
+      run: |
+        cargo install cargo-deb
+        cargo deb
+    - name: Upload DEB
+      uses: actions/upload-artifact@v2
+      with:
+        name: "ubuntu-20.04"
+        path: target/debian/*.deb