Upload binaries on end of CI

Author: palfrey

.github/workflows/linux.yml

@@ -88,3 +88,8 @@ jobs:
             echo Found local non-static refs!            
             exit 1
           fi
+      - name: Archive binary
+        uses: actions/upload-artifact@v3
+        with:
+          name: wait-for-db-linux-${{ matrix.build_arch }}
+          path: wait-for-db-linux-${{ matrix.build_arch }}