scaffold: add project CI and Docker templates under templates/project/_shared; update proposal and plan to include them

templates/project/_shared/.gitea/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: ci
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Build and run tests via Docker
+        run: |
+          docker compose -f docker/compose.yml up --build --abort-on-container-exit --remove-orphans
+          docker compose -f docker/compose.yml down -v --remove-orphans
+

templates/project/_shared/docker/compose.yml

@@ -0,0 +1,19 @@
+name: project
+
+services:
+  tests:
+    build:
+      context: ..
+      dockerfile: docker/test/Dockerfile
+    container_name: project-tests
+    working_dir: /work
+    volumes:
+      - ..:/work:Z
+    command: ["/bin/bash", "-lc", "scripts/test.sh"]
+    networks:
+      - project-net
+
+networks:
+  project-net:
+    name: project-net
+

templates/project/_shared/docker/test/Dockerfile

@@ -0,0 +1,11 @@
+FROM debian:bookworm-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+       ca-certificates git bash curl jq yq \
+       bats \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /work
+

templates/project/_shared/scripts/test.docker.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+here="$(cd "$(dirname "$0")" && pwd)"
+root="$(cd "$here/.." && pwd)"
+
+compose_file="$root/docker/compose.yml"
+
+echo "[docker] Running tests via docker compose"
+docker compose -f "$compose_file" up --build --abort-on-container-exit --remove-orphans
+docker compose -f "$compose_file" down -v --remove-orphans
+