Add sudo crate functionality

.gitignore

@@ -1,2 +1,3 @@
 /target
+/builds
 **/*.rs.bk

.semaphore/Dockerfile

@@ -0,0 +1,7 @@
+FROM rust:1.64.0-slim
+
+# Install SemaphoreCI dependencies
+# https://docs.semaphoreci.com/ci-cd-environment/custom-ci-cd-environment-with-docker/
+RUN apt-get update && apt-get install -y curl git openssh-client
+
+CMD ["/bin/bash"]

.semaphore/semaphore.yml

@@ -3,15 +3,18 @@ name: Rust
 agent:
   machine:
     type: e1-standard-2
+    os_image: ubuntu2004
   containers:
+    # Rust 1.64 (2021 edition) is currently not supported in Semaphore
     - name: main
-      image: registry.semaphoreci.com/rust:1.47
+      image: 'saluki/rust-ci:1.64'
 blocks:
-  - name: Test
+  - name: Test release
     task:
       jobs:
-        - name: cargo test
+        - name: Build & test
           commands:
             - checkout
+            - rustc --version
             - cargo build --verbose
             - cargo test --verbose