docs: add env var documentation to bun and deno runtime pages

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: wadefletch

docs/2.deploy/10.runtimes/bun.md

@@ -17,3 +17,14 @@ bun run ./.output/server/index.mjs
 ```
 
 :read-more{to="https://bun.sh"}
+
+### Environment Variables
+
+You can customize server behavior using following environment variables:
+
+- `NITRO_PORT` or `PORT` (defaults to `3000`)
+- `NITRO_HOST` or `HOST`
+- `NITRO_UNIX_SOCKET` - if provided (a path to the desired socket file) the service will be served over the provided UNIX socket.
+- `NITRO_SSL_CERT` and `NITRO_SSL_KEY` - if both are present, this will launch the server in HTTPS mode. In the vast majority of cases, this should not be used other than for testing, and the Nitro server should be run behind a reverse proxy like nginx or Cloudflare which terminates SSL.
+- `NITRO_SHUTDOWN_DISABLED` - Disables the graceful shutdown feature when set to `'true'`. Defaults to `'false'`.
+- `NITRO_SHUTDOWN_TIMEOUT` - Sets the amount of time (in milliseconds) before a forced shutdown occurs. Defaults to `3000` milliseconds.

docs/2.deploy/10.runtimes/deno.md

@@ -18,6 +18,16 @@ NITRO_PRESET=deno_server npm run build
 deno run --unstable --allow-net --allow-read --allow-env .output/server/index.ts
 ```
 
+### Environment Variables
+
+You can customize server behavior using following environment variables:
+
+- `NITRO_PORT` or `PORT` (defaults to `3000`)
+- `NITRO_HOST` or `HOST`
+- `NITRO_SSL_CERT` and `NITRO_SSL_KEY` - if both are present, this will launch the server in HTTPS mode. In the vast majority of cases, this should not be used other than for testing, and the Nitro server should be run behind a reverse proxy like nginx or Cloudflare which terminates SSL.
+- `NITRO_SHUTDOWN_DISABLED` - Disables the graceful shutdown feature when set to `'true'`. Defaults to `'false'`.
+- `NITRO_SHUTDOWN_TIMEOUT` - Sets the amount of time (in milliseconds) before a forced shutdown occurs. Defaults to `3000` milliseconds.
+
 ## Deno Deploy
 
 :read-more{to="/deploy/providers/deno-deploy"}