Update example env

.env.example

@@ -1,12 +1,16 @@
-MONGODB_URI=mongodb://username:password@localhost:27017
+MONGODB_URI=mongodb://db:27017
 DB_NAME=turbopress
-ASTRO_PORT=3001
-PAYLOAD_PORT=3000
-PAYLOAD_PUBLIC_SERVER_URL=http://localhost:3000
+# # FIXME: this is ignored? 🤔🤔🤔
+ASTRO_PORT=3000
+ASTRO_HOST=0.0.0.0
+HOST=0.0.0.0
+PAYLOAD_PORT=3001
+PAYLOAD_HOST=0.0.0.0
+PAYLOAD_PUBLIC_SERVER_URL=http://jett.localhost:3001
 PAYLOAD_SECRET=37aecd563edc5550a44bbf1e
-PAYLOAD_CONFIG_PATH=src/payload.config.ts
+# PAYLOAD_CONFIG_PATH=src/payload.config.ts
 S3_ACCESS_KEY_ID=
 S3_SECRET_ACCESS_KEY= 
 S3_REGION=
 S3_BUCKET=
-S3_ENDPOINT=
+S3_ENDPOINT=