Self-hosted dashboard and admin auth (#4837)

Co-authored-by: kartik-mem0 <kartik.labhshetwar@mem0.ai>

server/dashboard/entrypoint.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+set -e
+
+cd /app
+
+# Swap NEXT_PUBLIC_* placeholders baked into .next/ at build time with the
+# container's real env values. Each placeholder must be declared in the
+# Dockerfile as `ENV NAME=NAME` so Next.js inlines the literal name. Currently:
+#   NEXT_PUBLIC_API_URL, NEXT_PUBLIC_INSTANCE_NAME
+# New NEXT_PUBLIC_* vars must be added to the Dockerfile or this loop won't substitute them.
+printenv | grep '^NEXT_PUBLIC_' | while IFS='=' read -r key value; do
+  escaped=$(printf '%s' "$value" | sed -e 's/[\\&|]/\\&/g')
+  find .next/ -type f -exec sed -i "s|$key|$escaped|g" {} \;
+done
+echo "Done replacing env variables NEXT_PUBLIC_ with real values"
+
+exec "$@"