docs: add PI WEB configuration reference

src/cli.ts

@@ -386,20 +386,21 @@ function restartOrder(refs: ServiceRef[]): ServiceRef[] {
 }
 
 function productionServiceDefinitions(options: InstallOptions, configPath: string, executables: ServiceExecutables): ServiceDefinition[] {
+  const environment = configEnvironment(options, configPath);
   return [
     {
       ...serviceRefs.sessiond,
       description: "PI WEB session daemon",
       shellCommand: `exec ${executables.sessiond.command}`,
       restart: "on-failure",
-      environment: {},
+      environment,
     },
     {
       ...serviceRefs.web,
       description: "PI WEB server",
       shellCommand: `exec ${executables.web.command}`,
       restart: "on-failure",
-      environment: configEnvironment(options, configPath),
+      environment,
       after: ["sessiond"],
       wants: ["sessiond"],
     },
@@ -429,13 +430,14 @@ function validateDevCheckout(root: string): void {
 }
 
 function devServiceDefinitions(options: InstallOptions, configPath: string, root: string): ServiceDefinition[] {
+  const environment = configEnvironment(options, configPath);
   return [
     {
       ...serviceRefs.sessiond,
       description: "PI WEB session daemon (dev)",
       shellCommand: "exec npm run start:sessiond",
       restart: "never",
-      environment: {},
+      environment,
       workingDirectory: root,
     },
     {
@@ -443,7 +445,7 @@ function devServiceDefinitions(options: InstallOptions, configPath: string, root
       description: "PI WEB UI dev server",
       shellCommand: `exec /usr/bin/env bash -c ${serviceShellQuote('trap "kill 0" EXIT; npm run dev:web & npm run dev:client & wait')}`,
       restart: "never",
-      environment: configEnvironment(options, configPath),
+      environment,
       after: ["sessiond"],
       wants: ["sessiond"],
       workingDirectory: root,

src/server/sessiond.ts

@@ -21,13 +21,13 @@ import { getPiWebRuntimeComponent } from "./piWebStatus.js";
 import { SESSIOND_RUNTIME_CAPABILITIES } from "../shared/capabilities.js";
 import { effectivePiWebConfig, maxUploadBytes, spawnSessionsEnabled, subsessionsEnabled } from "../config.js";
 
-const app = Fastify({ logger: true, bodyLimit: maxUploadBytes() });
+const { config } = effectivePiWebConfig();
+const app = Fastify({ logger: true, bodyLimit: maxUploadBytes(process.env, config) });
 await app.register(fastifyWebsocket);
 
 const eventHub = new SessionEventHub();
 const workspaceActivity = new WorkspaceActivityService(eventHub);
 const auth = new AuthService();
-const { config } = effectivePiWebConfig();
 const spawnTargets = spawnSessionsEnabled(process.env, config)
   ? new ProjectScopedSpawnTargetResolver({ projects: new ProjectService(new ProjectStore()), workspaces: new WorkspaceService() })
   : undefined;