Add binary build

.gitlab-ci.yml

@@ -1,6 +1,25 @@
 variables:
   DOCKER_HOST: tcp://docker:2375
 
+bin:
+  stage: build
+  needs: []
+  image: rust:alpine
+  cache:
+    - key:
+      files:
+        - Cargo.toml
+        - Cargo.lock
+      paths:
+        - vendor/
+  script:
+    - mkdir ~/.cargo && mv config/cargo.toml ~/.cargo/config.toml
+    - cargo vendor
+    - cargo build --release
+  artifacts:
+    paths:
+      - target/release/stream-proxy
+
 build:
   image: docker:20
   stage: deploy