Add docker build file for UI and associated Actions workflow

barkmanui/ops/docker/caddy/Caddyfile

@@ -0,0 +1,6 @@
+http://* {
+	root * /app
+	encode
+	try_files {path} /index.html
+	file_server
+}

barkmanui/ops/docker/entrypoint.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+# Generate sed script file
+sed_script="/tmp/sed_script.sed"
+> "$sed_script"
+
+# Ensure the sed script file is cleaned up on exit
+trap 'rm -f "$sed_script"' EXIT
+
+# Extract VITE_ environment variables and build the sed expression
+env | grep '^VITE_' | while IFS='=' read -r key value; do
+    # Escape slashes and other special characters in key and value
+    escaped_key=$(printf '%s' "$key" | sed 's/[\/&]/\\&/g')
+    escaped_value=$(printf '%s' "$value" | sed 's/[\/&]/\\&/g')
+    # Append to sed script file
+    echo "s|${escaped_key}|${escaped_value}|g;" >> "$sed_script"
+done
+
+# Check if the sed script file was created and is not empty
+if [ ! -s "$sed_script" ]; then
+    echo "No VITE_ environment variables found. Exiting with error."
+    exit 1
+fi
+
+# sed All files
+find /app -type f -exec sed -i -f "$sed_script" '{}' +
+
+caddy run --config /etc/caddy/Caddyfile --adapter caddyfile