Add Docker image workflow for ani-cli-web

docker-entrypoint.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+set -eu
+
+is_true() {
+    case "$(printf '%s' "${1:-}" | tr '[:upper:]' '[:lower:]')" in
+        1 | true | yes | on) return 0 ;;
+        *) return 1 ;;
+    esac
+}
+
+mkdir -p /downloads /app/.ani-cli-web
+
+if is_true "${UPDATE_ON_START:-false}"; then
+    echo "Checking for ani-cli updates with sudo ani-cli --update"
+    sudo ani-cli --update
+fi
+
+cd /app
+exec ./ani-cli-web "$@"