Added Woodpecker CI config

.woodpecker.yml

@@ -0,0 +1,73 @@
+pipeline:
+    # Download the cache from S3
+    restore-cache:
+        image: plugins/s3-cache
+        pull: true
+
+        endpoint: https://s3.roosens.me
+        root: build-cache/
+        restore: true
+
+        secrets: [ cache_s3_access_key, cache_s3_secret_key ]
+
+
+    # =====BUILDING=====
+    build-backend:
+        image: rust:1.53-alpine
+        pull: true
+        group: build
+        environment:
+            - CARGO_HOME=.cargo
+        commands:
+            - cargo build
+
+
+    # =====TESTING=====
+    test-backend:
+        image: rust:1.53-alpine
+        environment:
+            - CARGO_HOME=.cargo
+        commands:
+            - cargo test
+
+
+    # =====LINTING=====
+    lint-backend:
+        image: rust:1.53-alpine
+        group: lint
+        environment:
+            - CARGO_HOME=.cargo
+        commands:
+            - cargo fmt -- --check
+            # This is run here because it requires compilation
+            - cargo clippy --all-targets -- -D warnings
+    
+
+    # =====REBUILD & FLUSH CACHE=====
+    rebuild-cache:
+        image: plugins/s3-cache
+
+        endpoint: https://s3.roosens.me
+        root: build-cache/
+        rebuild: true
+        mount:
+            - target
+            - .cargo
+
+        secrets: [ cache_s3_access_key, cache_s3_secret_key ]
+        # Push the cache, even on failure
+        when:
+            status: [ success, failure ]
+
+    flush-cache:
+        image: plugins/s3-cache
+
+        endpoint: https://s3.roosens.me
+        root: build-cache/
+        flush: true
+        flush_age: 14
+
+        secrets: [ cache_s3_access_key, cache_s3_secret_key ]
+        # Push the cache, even on failure
+        when:
+            status: [ success, failure ]