Upgrade Node.js to v22 and enable HTTP proxy support

- Upgrade base Node.js image from v20 to v22-alpine3.20
- Upgrade Alpine from 3.19 to 3.20 for both Node and Go base images
- Add NODE_USE_ENV_PROXY=1 environment variable to enable automatic proxy configuration
- Document HTTP proxy environment variables (HTTP_PROXY, HTTPS_PROXY, NO_PROXY)

This enables Sourcebot to work in enterprise environments that require HTTP/HTTPS proxies for external access. Node.js v22 natively supports proxy configuration via environment variables when NODE_USE_ENV_PROXY is enabled.

Co-authored-by: brendan <brendan@sourcebot.dev>

Author: cursoragent

Dockerfile

@@ -15,8 +15,8 @@ ARG NEXT_PUBLIC_SENTRY_BACKEND_DSN
 ARG NEXT_PUBLIC_LANGFUSE_PUBLIC_KEY
 ARG NEXT_PUBLIC_LANGFUSE_BASE_URL
 
-FROM node:20-alpine3.19 AS node-alpine
-FROM golang:1.23.4-alpine3.19 AS go-alpine
+FROM node:22-alpine3.20 AS node-alpine
+FROM golang:1.23.4-alpine3.20 AS go-alpine
 # ----------------------------------
 
 # ------ Build Zoekt ------
@@ -159,6 +159,7 @@ ENV NEXT_PUBLIC_LANGFUSE_BASE_URL=$NEXT_PUBLIC_LANGFUSE_BASE_URL
 WORKDIR /app
 ENV NODE_ENV=production
 ENV NEXT_TELEMETRY_DISABLED=1
+ENV NODE_USE_ENV_PROXY=1
 ENV DATA_DIR=/data
 ENV DATA_CACHE_DIR=$DATA_DIR/.sourcebot
 ENV DATABASE_DATA_DIR=$DATA_CACHE_DIR/db

docs/docs/configuration/environment-variables.mdx

@@ -37,6 +37,14 @@ The following environment variables allow you to configure your Sourcebot deploy
 | `DEFAULT_MAX_MATCH_COUNT` | `10000` | <p>The default maximum number of search results to return when using search in the web app.</p> |
 | `ALWAYS_INDEX_FILE_PATTERNS` | - | <p>A comma separated list of glob patterns matching file paths that should always be indexed, regardless of size or number of trigrams.</p> |
 
+### HTTP Proxy Configuration
+|| Variable | Default | Description |
+|| :------- | :------ | :---------- |
+|| `HTTP_PROXY` | - | <p>HTTP proxy URL for routing non-SSL requests through a proxy server (e.g., `http://proxy.company.com:8080`). Requires Node.js to be configured with `NODE_USE_ENV_PROXY=1`.</p> |
+|| `HTTPS_PROXY` | - | <p>HTTPS proxy URL for routing SSL requests through a proxy server (e.g., `http://proxy.company.com:8080`). Requires Node.js to be configured with `NODE_USE_ENV_PROXY=1`.</p> |
+|| `NO_PROXY` | - | <p>Comma-separated list of hostnames or domains that should bypass the proxy (e.g., `localhost,127.0.0.1,.internal.domain`). Requires Node.js to be configured with `NODE_USE_ENV_PROXY=1`.</p> |
+|| `NODE_USE_ENV_PROXY` | `1` | <p>Enables Node.js to automatically use `HTTP_PROXY`, `HTTPS_PROXY`, and `NO_PROXY` environment variables for network requests. Set to `1` to enable or `0` to disable.</p> |
+
 ### Enterprise Environment Variables
 | Variable | Default | Description |
 | :------- | :------ | :---------- |