docs: add env.example (#413)

Author: Justxd22

.env.example

@@ -0,0 +1,69 @@
+# --- REQUIRED ---
+SECRET=change_me_to_something_long_and_random # Generate: openssl rand -hex 128
+
+# --- POSTGRESQL ---
+DB_HOST=localhost
+DB_PORT=5432
+DB_NAME=nostr_ts_relay
+DB_USER=your_psql_username
+DB_PASSWORD=your_psql_password
+# Alternatively, use a URI:
+# DB_URI=postgresql://user:pass@localhost:5432/nostr_ts_relay
+
+# --- DB POOL TUNING (Optional) ---
+# DB_MIN_POOL_SIZE=0
+# DB_MAX_POOL_SIZE=3
+# DB_ACQUIRE_CONNECTION_TIMEOUT=60000
+
+# --- REDIS (Required for Rate Limiting) ---
+REDIS_HOST=localhost
+REDIS_PORT=6379
+# REDIS_USER=default
+# REDIS_PASSWORD=
+# Alternatively, use a URI:
+# REDIS_URI=redis://localhost:6379
+
+# --- SERVER CONFIG ---
+RELAY_PORT=8008
+WORKER_COUNT=2 # Defaults to CPU count. Use 1 or 2 for local testing.
+# NOSTR_CONFIG_DIR=.nostr # Where settings.yaml lives
+
+# --- DEBUGGING ---
+# Useful namespaces: maintenance-worker, database-client:*, cache-client, etc.
+# DEBUG=maintenance-worker
+
+# --- RELAY PRIVATE KEY (Optional) ---
+# RELAY_PRIVATE_KEY=your_hex_private_key
+
+# --- PAYMENTS (Only if enabled in settings.yaml) ---
+# ZEBEDEE_API_KEY=
+# NODELESS_API_KEY=
+# NODELESS_WEBHOOK_SECRET=
+# OPENNODE_API_KEY=
+# LNBITS_API_KEY=
+
+# --- READ REPLICAS (Optional) ---
+# READ_REPLICA_ENABLED=false
+# READ_REPLICAS=2
+# RR0_DB_HOST=localhost
+# RR0_DB_PORT=5432
+# RR0_DB_NAME=nostr_ts_relay
+# RR0_DB_USER=your_psql_username
+# RR0_DB_PASSWORD=your_psql_password
+# RR0_DB_MIN_POOL_SIZE=0
+# RR0_DB_MAX_POOL_SIZE=3
+# RR0_DB_ACQUIRE_CONNECTION_TIMEOUT=60000
+# RR1_DB_HOST=localhost
+# RR1_DB_PORT=5432
+# RR1_DB_NAME=nostr_ts_relay
+# RR1_DB_USER=your_psql_username
+# RR1_DB_PASSWORD=your_psql_password
+# RR1_DB_MIN_POOL_SIZE=0
+# RR1_DB_MAX_POOL_SIZE=3
+# RR1_DB_ACQUIRE_CONNECTION_TIMEOUT=60000
+
+# --- TOR (Optional) ---
+# TOR_HOST=localhost
+# TOR_CONTROL_PORT=9051
+# TOR_PASSWORD=
+# HIDDEN_SERVICE_PORT=80