chore: Dockerfile, README, LICENSE, .env.example, CI workflows (lint/test/deploy)

.gitea/workflows/lint.yml

@@ -0,0 +1,24 @@
+name: lint
+
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - uses: Swatinem/rust-cache@v2
+
+      - name: fmt
+        run: cargo fmt --all -- --check
+
+      - name: clippy
+        run: cargo clippy --workspace --all-targets -- -D warnings