feat: Initial automation.

.editorconfig

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+# Uses editorconfig to maintain consistent coding styles
+# http://EditorConfig.org
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 120
+trim_trailing_whitespace = true
+
+[*.toml]
+indent_size = 4
+
+[*.{css,html,js,json,less,sass,scss,yaml,yml}]
+indent_size = 2
+
+[*.{tf,tfvars}]
+indent_size = 2
+indent_style = space
+
+[*.md]
+max_line_length = 0
+trim_trailing_whitespace = false
+
+[Makefile*]
+indent_style = tab

.github/workflows/build-and-push.yml

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+# https://web.archive.org/web/20240917152738/https://andrewlock.net/combining-multiple-docker-images-into-a-multi-arch-image/
+name: Build and push
+
+on:
+  workflow_dispatch:
+
+# Variables available to all jobs defined in this file
+env:
+  DOCKER_BUILDKIT: 1
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build_intel64:
+    strategy:
+      fail-fast: true
+    name: Build Intel64
+    runs-on: [ubuntu-latest]
+    steps:
+      - name: Create Buildx driver
+        run: |
+          docker buildx use multiplatform || docker buildx create --name multiplatform --use 2>/dev/null
+
+      - name: Login to GHCR
+        run: |
+          echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u "${{ secrets.GHCR_USER }}" --password-stdin
+
+      - name: Clone AWS Lambda repo
+        run: |
+          git clone https://github.com/aws/aws-lambda-base-images.git --branch provided.al2023 --single-branch __aws__
+
+      - name: Build
+        run: |
+          set -euxo pipefail
+          cd __aws__/x86_64/ && \
+            output="$(
+              docker buildx build \
+                -t ghcr.io/northwood-labs/lambda-provided-al2023 \
+                -f Dockerfile.provided.al2023 \
+                --platform linux/amd64 \
+                --output push-by-digest=true,type=image,push=true \
+                . 2>&1
+            )"
+
+            echo "INTEL64_HASH=$(echo "$output" | grep "exporting manifest list" | awk '{print $5}')" >> $GITHUB_ENV
+
+  build_arm64:
+    strategy:
+      fail-fast: true
+    name: Build ARM64
+    runs-on: [ubuntu-latest]
+    steps:
+      - name: Create Buildx driver
+        run: |
+          docker buildx use multiplatform || docker buildx create --name multiplatform --use 2>/dev/null
+
+      - name: Login to GHCR
+        run: |
+          echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u "${{ secrets.GHCR_USER }}" --password-stdin
+
+      - name: Clone AWS Lambda repo
+        run: |
+          git clone https://github.com/aws/aws-lambda-base-images.git --branch provided.al2023 --single-branch __aws__
+
+      - name: Build
+        run: |
+          set -euxo pipefail
+          cd __aws__/arm64/ && \
+            output="$(
+              docker buildx build \
+                -t ghcr.io/northwood-labs/lambda-provided-al2023 \
+                -f Dockerfile.provided.al2023 \
+                --platform linux/arm64 \
+                --output push-by-digest=true,type=image,push=true \
+                . 2>&1
+            )"
+
+            echo "ARM64_HASH=$(echo "$output" | grep "exporting manifest list" | awk '{print $5}')" >> $GITHUB_ENV
+
+  merge:
+    needs: [build_intel64, build_arm64]
+    strategy:
+      fail-fast: true
+    name: Merge into multiplatform
+    runs-on: [ubuntu-latest]
+    steps:
+      - name: Create Buildx driver
+        run: |
+          docker buildx use multiplatform || docker buildx create --name multiplatform --use 2>/dev/null
+
+      - name: Login to GHCR
+        run: |
+          echo "${{ secrets.GHCR_TOKEN }}" | docker login ghcr.io -u "${{ secrets.GHCR_USER }}" --password-stdin
+
+      - name: Merge
+        run: |
+          set -euxo pipefail
+          docker buildx imagetools create \
+            -t ghcr.io/northwood-labs/lambda-provided-al2023:latest \
+              ghcr.io/northwood-labs/lambda-provided-al2023@${{ env.INTEL64_HASH }} \
+              ghcr.io/northwood-labs/lambda-provided-al2023@${{ env.ARM64_HASH }} \
+              ;

.markdownlint.json

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+{
+  "heading-increment": false,
+  "first-header-h1": true,
+  "header-style": {
+    "style": "atx"
+  },
+  "ul-style": {
+    "style": "asterisk"
+  },
+  "list-indent": true,
+  "ul-start-left": true,
+  "ul-indent": {
+    "indent": 4
+  },
+  "no-trailing-spaces": {
+    "br_spaces": 2,
+    "list_item_empty_lines": false
+  },
+  "single-trailing-newline": true,
+  "no-hard-tabs": {
+    "code_blocks": false
+  },
+  "no-reversed-links": true,
+  "no-multiple-blanks": {
+    "maximum": 1
+  },
+  "line-length": {
+    "line_length": 10000,
+    "code_blocks": false,
+    "tables": false
+  },
+  "commands-show-output": false,
+  "no-missing-space-atx": true,
+  "no-multiple-space-atx": true,
+  "blanks-around-headers": {
+    "lines_above": 1,
+    "lines_below": 1
+  },
+  "header-start-left": true,
+  "no-duplicate-header": {
+    "allow_different_nesting": true
+  },
+  "single-h1": {
+    "level": 1
+  },
+  "no-trailing-punctuation": {
+    "punctuation": ".,;:"
+  },
+  "no-multiple-space-blockquote": true,
+  "no-blanks-blockquote": true,
+  "ol-prefix": {
+    "style": "one"
+  },
+  "list-marker-space": {
+    "ul_single": 1,
+    "ol_single": 1,
+    "ul_multi": 1,
+    "ol_multi": 1
+  },
+  "blanks-around-fences": {
+    "list_items": true
+  },
+  "blanks-around-lists": true,
+  "no-inline-html": {
+    "allowed_elements": [
+      "a",
+      "b",
+      "br",
+      "code",
+      "details",
+      "div",
+      "img",
+      "li",
+      "nobr",
+      "p",
+      "pre",
+      "summary",
+      "ul"
+    ]
+  },
+  "no-bare-urls": true,
+  "hr-style": {
+    "style": "consistent"
+  },
+  "no-emphasis-as-header": true,
+  "no-space-in-emphasis": false,
+  "no-space-in-code": false,
+  "no-space-in-links": true,
+  "fenced-code-language": true,
+  "code-block-style": {
+    "style": "fenced"
+  },
+  "first-line-h1": false,
+  "no-empty-links": true,
+  "proper-names": {
+    "names": [],
+    "code_blocks": false
+  }
+}

README.md

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+# Multi-Platform AWS Lambda Environment Image
+
+This repository auto-builds a multi-platform (`x86_64`/`ARM64`) Docker image for the `provided.al2023` AWS Lambda environment.
+
+The `provided.al2023` environment is the one intended for compiled code (C, C++, Rust, Go, etc.), or to use Lambda Layers to modify.
+
+## Source
+
+<https://github.com/aws/aws-lambda-base-images/tree/provided.al2023>
+
+## Usage
+
+TBD
+
+## Issues
+
+If you have an issue with this multi-platform Docker image, **DO NOT FILE AN ISSUE HERE**. Instead, [file an issue with AWS](https://github.com/aws/aws-lambda-base-images/tree/provided.al2023).