ci: add Gitea Actions pipeline and Dockerfile

Three-stage CI pipeline with fmt, clippy and audit as parallel
quality gates, tests gated on quality, and Docker build+push
to registry.meghsakha.com on main and release/* branches.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches:
+      - "**"
+  pull_request:
+    branches:
+      - main
+
+env:
+  CARGO_TERM_COLOR: always
+  RUSTFLAGS: "-D warnings"
+
+# Cancel in-progress runs for the same branch/PR
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  # ---------------------------------------------------------------------------
+  # Stage 1: Code quality checks (run in parallel)
+  # ---------------------------------------------------------------------------
+  fmt:
+    name: Format
+    runs-on: docker
+    container:
+      image: rust:1.89-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add rustfmt
+      - run: cargo fmt --check
+
+  clippy:
+    name: Clippy
+    runs-on: docker
+    container:
+      image: rust:1.89-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - run: rustup component add clippy
+      # Lint both feature sets independently
+      - name: Clippy (server)
+        run: cargo clippy --features server --no-default-features -- -D warnings
+      - name: Clippy (web)
+        run: cargo clippy --features web --no-default-features -- -D warnings
+
+  audit:
+    name: Security Audit
+    runs-on: docker
+    container:
+      image: rust:1.89-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - run: cargo install cargo-audit
+      - run: cargo audit
+
+  # ---------------------------------------------------------------------------
+  # Stage 2: Tests (only after all quality checks pass)
+  # ---------------------------------------------------------------------------
+  test:
+    name: Tests
+    runs-on: docker
+    needs: [fmt, clippy, audit]
+    container:
+      image: rust:1.89-bookworm
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run tests (server)
+        run: cargo test --features server --no-default-features
+      - name: Run tests (web)
+        run: cargo test --features web --no-default-features
+
+  # ---------------------------------------------------------------------------
+  # Stage 3: Build Docker image and push to registry
+  #           Only on main and release/* branches
+  # ---------------------------------------------------------------------------
+  build-and-push:
+    name: Build & Push Image
+    runs-on: docker
+    needs: [test]
+    if: >-
+      github.event_name == 'push' &&
+      (github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release/'))
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Determine image tag
+        id: tag
+        run: |
+          BRANCH="${GITHUB_REF#refs/heads/}"
+          # Replace / with - for valid Docker tags (e.g. release/1.0 -> release-1.0)
+          BRANCH_SAFE=$(echo "$BRANCH" | tr '/' '-')
+          SHA=$(echo "$GITHUB_SHA" | head -c 8)
+          echo "tag=${BRANCH_SAFE}-${SHA}" >> "$GITHUB_OUTPUT"
+
+      - name: Log in to container registry
+        run: >-
+          echo "${{ secrets.REGISTRY_PASSWORD }}"
+          | docker login https://registry.meghsakha.com
+          -u "${{ secrets.REGISTRY_USERNAME }}"
+          --password-stdin
+
+      - name: Build Docker image
+        run: >-
+          docker build
+          -t registry.meghsakha.com/certifai/dashboard:${{ steps.tag.outputs.tag }}
+          -t registry.meghsakha.com/certifai/dashboard:latest
+          .
+
+      - name: Push Docker image
+        run: |
+          docker push registry.meghsakha.com/certifai/dashboard:${{ steps.tag.outputs.tag }}
+          docker push registry.meghsakha.com/certifai/dashboard:latest

Dockerfile

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+# Stage 1: Generate dependency recipe for caching
+FROM rust:1.89-bookworm AS chef
+RUN cargo install cargo-chef
+WORKDIR /app
+
+FROM chef AS planner
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+# Stage 2: Build dependencies + application
+FROM chef AS builder
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    pkg-config libssl-dev curl unzip \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install bun (for Tailwind CSS build step)
+RUN curl -fsSL https://bun.sh/install | bash
+ENV PATH="/root/.bun/bin:$PATH"
+
+# Install dx CLI via cargo-binstall
+RUN curl -L --proto '=https' --tlsv1.2 -sSf \
+    https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh \
+    | bash
+RUN cargo binstall dioxus-cli@0.7.3 --root /.cargo -y --force
+ENV PATH="/.cargo/bin:$PATH"
+
+# Cook dependencies from recipe (cached layer)
+COPY --from=planner /app/recipe.json recipe.json
+RUN cargo chef cook --release --recipe-path recipe.json
+
+# Copy source and build
+COPY . .
+
+# Ensure styles directory exists for build.rs tailwind step
+RUN mkdir -p styles && touch styles/input.css
+
+# Bundle the fullstack application
+RUN dx bundle --platform fullstack
+
+# Stage 3: Minimal runtime image
+FROM debian:bookworm-slim AS runtime
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates libssl3 \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN useradd --create-home --shell /bin/bash app
+USER app
+WORKDIR /home/app
+
+# Copy the bundled output from builder
+COPY --from=builder --chown=app:app /app/target/dx/dashboard/release/web/ ./
+
+EXPOSE 8000
+
+ENV IP=0.0.0.0
+ENV PORT=8000
+
+ENTRYPOINT ["./server"]