Add docker image for LTS packages

.github/workflows/anaconda_pkg_build_lts_linux.yml

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+name: Build and publish Linux package builder images for LTS
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - 'lts-pkg-build-*'
+    paths:
+      - 'anaconda-pkg-build-lts/linux/Dockerfile'
+      - '.github/workflows/anaconda_pkg_build_lts_linux.yml'
+  pull_request:
+    paths:
+      - 'anaconda-pkg-build-lts/linux/Dockerfile'
+      - '.github/workflows/anaconda_pkg_build_lts_linux.yml'
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v2
+        if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags')
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Login to Public ECR
+        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v2
+        if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags')
+        with:
+          registry: public.ecr.aws
+          username: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          password: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        env:
+          AWS_REGION: us-east-1
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v2
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v2
+        with:
+          version: latest
+          driver-opts: network=host
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@96383f45573cb7f253c731d3b3ab81c87ef81934 # v4
+        with:
+          images: |
+            continuumio/anaconda-pkg-build
+            public.ecr.aws/y0o4y9o3/anaconda-pkg-build
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=match,pattern=lts-pkg-build-(.*),group=1,suffix=-lts
+
+      - name: build-push pkg-builder
+        uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v4
+        with:
+          context: ./anaconda-pkg-build-lts/linux
+          builder: ${{ steps.buildx.outputs.name }}
+          file: ./anaconda-pkg-build-lts/linux/Dockerfile
+          platforms: linux/amd64,linux/ppc64le,linux/arm64/v8,linux/s390x
+          build-args: |
+            BASEVERSION=7
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          push: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags') }}

anaconda-pkg-build-lts/linux/Dockerfile

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+# Dockerfile for container images that Anaconda, Inc. uses to build conda
+# packages released on the "defaults" (repo.anaconda.com) channels.
+
+FROM continuumio/anaconda-pkg-build:2023.03.28
+
+RUN /opt/conda/bin/conda install --quiet --yes jcmorin-ana-org::anaconda-time-machine && /opt/conda/bin/conda update conda conda-build
+
+ENV PATH="/opt/conda/bin:${PATH}"
+
+CMD [ "/bin/bash" ]