Alias latest tag to latest release

.github/workflows/build.yml

@@ -2,6 +2,7 @@ name: Build Docker Image
 on: push
 env:
   DOCKER_BUILDKIT: 1
+  LATEST_TAG: 0.19.0.1
 jobs:
   build:
     runs-on: ubuntu-18.04
@@ -75,6 +76,10 @@ jobs:
           versions=$(docker images lukechilds/bitcoind --format "{{.Tag}}" | grep amd64 | cut -d- -f1)
           for version in $versions; do
             tags=$(docker images lukechilds/bitcoind --format "{{.Tag}}" | grep $version- | sed 's/^/lukechilds\/bitcoind\:&/')
+            if [[ $version = $LATEST_TAG ]]; then
+              docker manifest create lukechilds/bitcoind:latest $tags
+              docker manifest push lukechilds/bitcoind:latest
+            fi
             docker manifest create "lukechilds/bitcoind:${version}" $tags
             docker manifest push "lukechilds/bitcoind:${version}"
             docker manifest inspect "lukechilds/bitcoind:${version}"