readme: add self-hosted runners and container jobs

.github/workflows/test-docker.yml

@@ -32,20 +32,39 @@ jobs:
     env:
       TARANTOOL_CACHE_KEY_SUFFIX: -DA-${{ matrix.image }}-${{ github.run_id }}
       DEBIAN_FRONTEND: noninteractive
-      TZ: Etc/UTC
 
     steps:
-      - name: Setup system
+      - name: Configure apt-get
+        run: |
+          mkdir -p /etc/apt/apt.conf.d
+          printf '%s\n%s\n'                    \
+            'APT::Install-Recommends "false";' \
+            'APT::Install-Suggests "false";'   \
+            > /etc/apt/apt.conf.d/no-recommends-no-suggests.conf
+
+      - name: Update repositories metadata
         run: |
           apt-get -y update
-          apt-get -y upgrade
-          apt-get -y install --no-install-recommends --no-install-suggests \
-            tzdata sudo lsb-release gnupg ca-certificates rsync
 
-      - name: Setup nodejs
-        uses: actions/setup-node@v3
+      - name: Workaround interactive tzdata configuration problem (gh-50)
+        run:
+          apt-get -y install tzdata
+
+      - name: Install setup-tarantool dependencies
+        run: |
+          apt-get -y install sudo lsb-release gnupg ca-certificates rsync
+
+      # Bring `node` executable file into PATH for latest-version
+      # and verify-versions actions.
+      #
+      # It is not needed for a usual usage of the setup-tarantool
+      # action within a container job, because GitHub Action
+      # runner mounts a volume with a `node` executable into the
+      # container.
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
         with:
-          node-version: '18.18.0'
+          node-version: 20
 
       - uses: actions/checkout@v4
 

README.md

@@ -6,8 +6,10 @@ This action will set up [Tarantool](https://www.tarantool.io) environment and **
 
 - When cached, it takes \~1-2s to finish.
 - The first run takes \~40s.
-- Cache size is \~20MB.
-- Runs on GitHub-hosted `ubuntu-*` runners only.
+- Cache size is 20MB-30MB.
+- Runs on GitHub-hosted `ubuntu-*` runners.
+- Runs on Debian/Ubuntu self-hosted runners.
+- Runs inside Debian/Ubuntu container jobs.
 
 # Usage
 
@@ -47,6 +49,51 @@ steps:
       nightly-build: true
 ```
 
+### Self-hosted runners and container jobs
+
+It requires an additional step to bring dependencies needed for the action
+itself. These dependencies are preinstalled on GitHub hosted runners, but a
+self-hosted runner and a docker image may miss them.
+
+Configuring `apt-get` to skip recommended and suggested packages reduces the
+cache size from \~200MiB to \~30MiB.
+
+```yaml
+jobs:
+  myjob:
+    runs-on: ubuntu-latest
+    container:
+      image: debian:bookworm
+
+    env:
+      DEBIAN_FRONTEND: noninteractive
+
+    steps:
+      - name: Configure apt-get
+        run: |
+          mkdir -p /etc/apt/apt.conf.d
+          printf '%s\n%s\n'                    \
+            'APT::Install-Recommends "false";' \
+            'APT::Install-Suggests "false";'   \
+            > /etc/apt/apt.conf.d/no-recommends-no-suggests.conf
+
+      - name: Update repositories metadata
+        run: |
+          apt-get -y update
+
+      - name: Workaround interactive tzdata configuration problem (gh-50)
+        run:
+          apt-get -y install tzdata
+
+      - name: Install setup-tarantool dependencies
+        run: |
+          apt-get -y install sudo lsb-release gnupg ca-certificates rsync
+
+      - uses: tarantool/setup-tarantool@ab69f5679e6ea7e5872d9e0901f681587fd29be6
+        with:
+          tarantool-version: '2.11'
+```
+
 # License
 
 The scripts and documentation in this project are released under the [MIT License](LICENSE).