app-torcx/docker: Add a Docker 20.10 torcx image

Compared to previous torcx images the docker-cli package is a separate
package, following upstream Docker repo layout changes.

Signed-off-by: Jeremi Piotrowski <jpiotrowski@microsoft.com>

sdk_container/src/third_party/coreos-overlay/app-torcx/docker/docker-20.10.ebuild

@@ -0,0 +1,30 @@
+# Copyright (c) 2017-2018 CoreOS, Inc.. All rights reserved.
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=2
+
+DESCRIPTION="Packages to be installed in a torcx image for Docker"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64 arm64"
+
+# Explicitly list all packages that will be built into the image.
+RDEPEND="
+	~app-emulation/docker-20.10.7
+	~app-emulation/docker-cli-20.10.7
+	~app-emulation/containerd-1.5.4
+	~app-emulation/docker-proxy-0.8.0_p20210525
+	~app-emulation/docker-runc-1.0.1
+	=dev-libs/libltdl-2.4.6
+	~sys-process/tini-0.19.0
+"
+
+src_install() {
+	insinto /.torcx
+	newins "${FILESDIR}/${P}-manifest.json" manifest.json
+
+	# Enable the Docker socket by default.
+	local unitdir=/usr/lib/systemd/system
+	dosym ../docker.socket "${unitdir}/sockets.target.wants/docker.socket"
+}

sdk_container/src/third_party/coreos-overlay/app-torcx/docker/files/docker-20.10-manifest.json

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+{
+    "kind": "image-manifest-v0",
+    "value": {
+        "bin": [
+            "/bin/containerd",
+            "/bin/containerd-shim",
+            "/bin/ctr",
+            "/bin/docker",
+            "/bin/docker-containerd",
+            "/bin/docker-containerd-shim",
+            "/bin/docker-init",
+            "/bin/docker-proxy",
+            "/bin/docker-runc",
+            "/bin/dockerd",
+            "/bin/runc",
+            "/bin/tini"
+        ],
+        "network": [
+            "/lib/systemd/network/50-docker.network",
+            "/lib/systemd/network/90-docker-veth.network"
+        ],
+        "units": [
+            "/lib/systemd/system/containerd.service",
+            "/lib/systemd/system/docker.service",
+            "/lib/systemd/system/docker.socket",
+            "/lib/systemd/system/sockets.target.wants"
+        ]
+    }
+}