first pass

.env.example

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+# ============================================================
+#  Matrix Stack — Environment Configuration
+#  Copy this file to .env and fill in all values
+#  cp .env.example .env
+# ============================================================
+
+
+# ------------------------------------------------------------
+# DOMAIN
+# Your base domain. matrix.DOMAIN_NAME and livekit.DOMAIN_NAME
+# will be derived from this automatically.
+# ------------------------------------------------------------
+DOMAIN_NAME=
+
+
+# ------------------------------------------------------------
+# SERVER
+# The public IPv4 address of this server.
+# Used by LiveKit and coturn to advertise themselves externally.
+#   curl -4 ifconfig.me
+# ------------------------------------------------------------
+EXTERNAL_IP=
+
+
+# ------------------------------------------------------------
+# TURN SECRET
+# Shared secret between coturn and tuwunel for TURN auth.
+# Must match on both sides — do not set them separately.
+#   openssl rand -hex 32
+# ------------------------------------------------------------
+STATIC_AUTH_SECRET=
+
+
+# ------------------------------------------------------------
+# LIVEKIT API CREDENTIALS
+# Key/secret pair for LiveKit. Used by the server, lk-jwt-service,
+# and must match the LIVEKIT_KEYS entry in livekit.yaml if set there.
+#   API_KEY:    openssl rand -hex 16
+#   API_SECRET: openssl rand -hex 32
+# ------------------------------------------------------------
+API_KEY=
+API_SECRET=
+
+
+# ------------------------------------------------------------
+# DOCKER NETWORK
+# The external Docker network shared across your stacks.
+# Create it first if it doesn't exist: docker network create <name>
+# ------------------------------------------------------------
+NETWORK_NAME=backbone
+
+
+# ------------------------------------------------------------
+# IMAGE TAG
+# Docker image tag to deploy. Use 'latest' for development.
+# Set to a specific SHA or version tag for production stability.
+# ------------------------------------------------------------
+GIT_SHA=latest