add Docker and CI/CD pipeline with ledo

Configure Next.js static export with nginx serving, Dockerfile
(multi-stage build), docker-compose for prod/dev, Gitea Actions
pipelines for build-on-push and tag-based releases using ledo tool.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker/docker-entrypoint.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+set -eo pipefail
+shopt -s nullglob
+
+#
+# H E L P E R    F U N C T I O N S 
+#
+##################################
+declare -i term_width=80
+
+
+h1() {
+    declare border padding text
+    border='\e[1;34m'"$(printf '=%.0s' $(seq 1 "$term_width"))"'\e[0m'
+    padding="$(printf ' %.0s' $(seq 1 $(((term_width - $(wc -m <<<"$*")) / 2))))"
+    text="\\e[1m$*\\e[0m"
+    echo -e "$border"
+    echo -e "${padding}${text}${padding}"
+    echo -e "$border"
+}
+
+h2() {
+    printf '\e[1;33m==>\e[37;1m %s\e[0m\n' "$*"
+}
+
+#
+# M A I N    F U N C T I O N S
+#
+#################################
+
+h1 "Project init"
+
+###
+### Your code here
+###
+
+h1 "End of init"
+
+exec "$@"