release-tools: Add docker flow and release preparation script

.github/workflows/docker.yml

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+name: ci
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - 'v*.*.*'
+  pull_request:
+    branches:
+      - 'main'
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          # list of Docker images to use as base name for tags
+          images: |
+            nitnelave/lldap
+          # generate Docker tags based on the following events/attributes
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          platforms: linux/amd64
+          tags: nitnelave/lldap:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+      -
+        name: Update repo description
+        if: github.event_name != 'pull_request'
+        uses: peter-evans/dockerhub-description@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          repository: nitnelave/lldap

prepare-release.sh

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+#! /bin/sh
+
+set -e
+set -x
+
+# Build the binary server, for x86_64.
+cargo build --release -p lldap
+
+cargo install cross
+cross build --target=armv7-unknown-linux-musleabihf -p lldap --release
+
+# Build the frontend.
+./app/build.sh
+
+VERSION=$(git describe --tags)
+
+mkdir -p /tmp/release/x86_64
+cp target/release/lldap /tmp/release/x86_64
+cp -R app/index.html app/main.js app/pkg lldap_config.docker_template.toml README.md LICENSE /tmp/release/x86_64
+tar -czvf lldap-x86_64-${VERSION}.tar.gz /tmp/release/x86_64
+
+mkdir -p /tmp/release/armv7
+cp target/armv7-unknown-linux-musleabihf/release/lldap /tmp/release/armv7
+cp -R app/index.html app/main.js app/pkg lldap_config.docker_template.toml README.md LICENSE /tmp/release/armv7
+tar -czvf lldap-armv7-${VERSION}.tar.gz /tmp/release/armv7