fix penny deployment CI + disable caching for lambdas deployments

.github/scripts/install-docker.bash

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -eu
+
+# Docker installation steps, from their own website:
+
+# Add Docker's official GPG key:
+apt-get update -y
+apt-get install ca-certificates curl gnupg -y
+install -m 0755 -d /etc/apt/keyrings
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+chmod a+r /etc/apt/keyrings/docker.gpg
+
+# Add the repository to Apt sources:
+# shellcheck source=/dev/null
+echo \
+  "deb [arch=\"$(dpkg --print-architecture)\" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+    \"$(. /etc/os-release && echo "$VERSION_CODENAME")\" stable" |
+  tee /etc/apt/sources.list.d/docker.list >/dev/null
+apt-get update -y
+
+# Install Docker:
+apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y

.github/workflows/deploy-all-lambdas.yml

@@ -33,6 +33,7 @@ jobs:
           git checkout ${{ github.sha }}
 
       - name: Restore .build
+        if: false # ❌ Needs node 20 which amazonlinux2 doesn't have
         id: "restore-cache"
         uses: actions/cache/restore@v4
         with:
@@ -71,6 +72,7 @@ jobs:
           done
 
       - name: Cache .build
+        if: false # ❌ Needs node 20 which amazonlinux2 doesn't have
         uses: actions/cache/save@v4
         with:
           path: ${{ github.event.repository.name }}/.build

.github/workflows/deploy-penny.yml

@@ -11,6 +11,8 @@ jobs:
 
     runs-on: ubuntu-latest
 
+    container: swift:6.0-jammy
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -42,6 +44,14 @@ jobs:
           path: .build
           key: "penny-release-static-build-${{ runner.os }}-${{ github.event.after }}"
 
+      - name: Install Docker
+        run: |
+          # Make scripts executable
+          chmod +x ./.github/scripts/*
+
+          # Install Docker
+          ./.github/scripts/install-docker.bash
+
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v4
         with: