Aggiungo stack Supabase self-hosted e config di produzione

Stack Docker completo in infra/supabase/docker/ (vendored da supabase/supabase)
per svincolare dev e produzione da Lovable Cloud. Include override di
produzione che non espone porte pubblicamente e disattiva i servizi non
usati da CrAPP (Realtime, Storage, imgproxy, Edge Functions, pooler),
un Caddyfile con routing /api/* per un solo dominio, e i template .env
per app e stack. Forzo inoltre il preset Nitro a node-server in
vite.config.ts, dato che il default sarebbe Cloudflare Workers.

infra/supabase/docker/volumes/functions/main/index.ts

@@ -0,0 +1,177 @@
+import * as jose from 'jsr:@panva/jose@6'
+
+console.log('main function started')
+
+const JWT_SECRET = Deno.env.get('JWT_SECRET')
+const SUPABASE_JWKS = parseJwks(Deno.env.get('SUPABASE_JWKS'))
+const VERIFY_JWT = Deno.env.get('VERIFY_JWT') === 'true'
+
+// NOTE:(kallebysantos) We don't check for valid keys but just the bare array parsing,
+// let this for 'jose' lib verification
+export function parseJwks(raw: string | undefined): jose.JSONWebKeySet | null {
+  if (!raw) return null
+  try {
+    const parsed = JSON.parse(raw)
+    if (parsed?.keys && Array.isArray(parsed.keys)) {
+      return parsed as jose.JSONWebKeySet
+    }
+    return null
+  } catch {
+    return null
+  }
+}
+
+/**
+ * Extract JWT token from Authorization header
+ *
+ * Parses the Authorization header to extract the Bearer token.
+ * Expects format: "Bearer <token>"
+ *
+ * @param req - The HTTP request object
+ * @returns The JWT token string
+ * @throws Error if Authorization header is missing or malformed
+ */
+function getAuthToken(req: Request) {
+  const authHeader = req.headers.get('authorization')
+  if (!authHeader) {
+    throw new Error('Missing authorization header')
+  }
+  const [bearer, token] = authHeader.split(' ')
+  if (bearer !== 'Bearer') {
+    throw new Error(`Auth header is not 'Bearer {token}'`)
+  }
+  return token
+}
+
+async function isValidLegacyJWT(jwt: string): Promise<boolean> {
+  if (!JWT_SECRET) {
+    console.error('JWT_SECRET not available for HS256 token verification')
+    return false
+  }
+
+  const encoder = new TextEncoder();
+  const secretKey = encoder.encode(JWT_SECRET);
+
+  try {
+    await jose.jwtVerify(jwt, secretKey);
+  } catch (e) {
+    console.error('Symmetric Legacy JWT verification error', e);
+    return false;
+  }
+  return true;
+}
+
+async function isValidJWT(jwt: string): Promise<boolean> {
+  if (!SUPABASE_JWKS) {
+    console.error('JWKS not available for ES256/RS256 token verification')
+    return false
+  }
+
+  try {
+    const localJwks = jose.createLocalJWKSet(SUPABASE_JWKS);
+    await jose.jwtVerify(jwt, localJwks);
+  } catch (e) {
+    console.error('Asymmetric JWT verification error', e);
+    return false
+  }
+
+  return true;
+}
+
+/**
+ * Verify JWT token, handling both legacy (HS256) and newer (ES256/RS256) algorithms
+ * 
+ * This function automatically detects the algorithm used in the token and applies
+ * the appropriate verification method:
+ * - HS256: Uses JWT_SECRET (symmetric key)
+ * - ES256/RS256: Uses JWKS endpoint (asymmetric public keys)
+ * 
+ * This fix ensures compatibility with both legacy tokens and newer asymmetric tokens,
+ * resolving the "Key for the ES256 algorithm must be of type CryptoKey" error.
+ * 
+ * @param jwt - The JWT token string to verify
+ * @returns Promise resolving to true if verification succeeds, false otherwise
+ */
+async function isValidHybridJWT(jwt: string): Promise<boolean> {
+  const { alg: jwtAlgorithm } = jose.decodeProtectedHeader(jwt)
+
+  if (jwtAlgorithm === 'HS256') {
+    console.log(`Legacy token type detected, attempting ${jwtAlgorithm} verification.`)
+
+    return await isValidLegacyJWT(jwt)
+  }
+
+  if (jwtAlgorithm === 'ES256' || jwtAlgorithm === 'RS256') {
+    return await isValidJWT(jwt)
+  }
+
+  return false;
+}
+
+Deno.serve(async (req: Request) => {
+  if (req.method !== 'OPTIONS' && VERIFY_JWT) {
+    try {
+      const token = getAuthToken(req)
+      const isValidJWT = await isValidHybridJWT(token);
+
+      if (!isValidJWT) {
+        return new Response(JSON.stringify({ msg: 'Invalid JWT' }), {
+          status: 401,
+          headers: { 'Content-Type': 'application/json' },
+        })
+      }
+    } catch (e) {
+      console.error(e)
+      return new Response(JSON.stringify({ msg: e.toString() }), {
+        status: 401,
+        headers: { 'Content-Type': 'application/json' },
+      })
+    }
+  }
+
+  const url = new URL(req.url)
+  const { pathname } = url
+  const path_parts = pathname.split('/')
+  const service_name = path_parts[1]
+
+  if (!service_name || service_name === '') {
+    const error = { msg: 'missing function name in request' }
+    return new Response(JSON.stringify(error), {
+      status: 400,
+      headers: { 'Content-Type': 'application/json' },
+    })
+  }
+
+  const servicePath = `/home/deno/functions/${service_name}`
+  console.error(`serving the request with ${servicePath}`)
+
+  const memoryLimitMb = 150
+  const workerTimeoutMs = 1 * 60 * 1000
+  const noModuleCache = false
+  // Using a common Import Map for all functions 
+  // to use a scope 'deno.json' it must be dinamically resolved base on the 'service_name'
+  const importMapPath = `/home/deno/functions/deno.jsonc`
+  // SUPABASE_FUNCTION_SLUG is listed after the container env snapshot so
+  // nothing in it can shadow the value, and it is per-request because only this
+  // worker knows which function the request resolved to.
+  const envVarsObj = { ...Deno.env.toObject(), SUPABASE_FUNCTION_SLUG: service_name }
+  const envVars = Object.keys(envVarsObj).map((k) => [k, envVarsObj[k]])
+
+  try {
+    const worker = await EdgeRuntime.userWorkers.create({
+      servicePath,
+      memoryLimitMb,
+      workerTimeoutMs,
+      noModuleCache,
+      importMapPath,
+      envVars,
+    })
+    return await worker.fetch(req)
+  } catch (e) {
+    const error = { msg: e.toString() }
+    return new Response(JSON.stringify(error), {
+      status: 500,
+      headers: { 'Content-Type': 'application/json' },
+    })
+  }
+})