Add Resend support, updates to subscription system

.env.example

@@ -18,8 +18,13 @@ BETTER_AUTH_SECRET=
 # OAUTH_SCOPES=openid email profile
 # OAUTH_PKCE=false
 
-# Email
-# Not required, but needed for functions like sending password reset emails.
+# Email (optional — needed for password reset and email verification)
+# FROM_EMAIL_ADDRESS is required for email sending to work.
+# If both provider keys are set, Resend takes priority.
+FROM_EMAIL_ADDRESS=
+VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS=
+
+RESEND_API_KEY=
 SENDGRID_API_KEY=
 
 # Integrations
@@ -29,3 +34,9 @@ INSTAPAPER_OAUTH_SECRET=
 # Analytics
 VITE_PUBLIC_UMAMI_WEBSITE_ID=
 VITE_PUBLIC_UMAMI_SRC=
+
+# Error Tracking (Sentry/GlitchTip)
+VITE_PUBLIC_SENTRY_DSN_WEB=
+VITE_PUBLIC_SENTRY_SECURITY_ENDPOINT_WEB=
+SENTRY_DSN_BACKEND=
+SENTRY_SECURITY_ENDPOINT_BACKEND=

README.md

@@ -52,9 +52,10 @@ Serial takes a model of progressive enhancement for features. The app can run wi
 
 ### Email support (for password reset, etc)
 
-- Create an account on [Sendgrid](https://sendgrid.com/en-us)
-- Set up a mailing address
-- Add your `SENDGRID_API_KEY` to `.env` or your host's environment variables UI.
+Serial supports [Resend](https://resend.com) and [SendGrid](https://sendgrid.com/en-us) as email providers. Only one is used at a time — if both keys are set, Resend takes priority.
+
+- **Resend**: Create an account, add your `RESEND_API_KEY` to `.env` or your host's environment variables UI.
+- **SendGrid**: Create an account, set up a mailing address, add your `SENDGRID_API_KEY` to `.env` or your host's environment variables UI.
 
 ### Instapaper integration
 

docker-compose.arm.yaml

@@ -21,7 +21,10 @@ services:
       NODE_ENV: production
       DATABASE_URL: http://libsql:8080
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      FROM_EMAIL_ADDRESS: ${FROM_EMAIL_ADDRESS}
+      RESEND_API_KEY: ${RESEND_API_KEY}
       SENDGRID_API_KEY: ${SENDGRID_API_KEY}
+      VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS: ${VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS}
       INSTAPAPER_OAUTH_ID: ${INSTAPAPER_OAUTH_ID}
       INSTAPAPER_OAUTH_SECRET: ${INSTAPAPER_OAUTH_SECRET}
     depends_on:

docker-compose.build-arm.yaml

@@ -25,7 +25,10 @@ services:
       NODE_ENV: production
       DATABASE_URL: http://libsql:8080
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      FROM_EMAIL_ADDRESS: ${FROM_EMAIL_ADDRESS}
+      RESEND_API_KEY: ${RESEND_API_KEY}
       SENDGRID_API_KEY: ${SENDGRID_API_KEY}
+      VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS: ${VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS}
       INSTAPAPER_OAUTH_ID: ${INSTAPAPER_OAUTH_ID}
       INSTAPAPER_OAUTH_SECRET: ${INSTAPAPER_OAUTH_SECRET}
     depends_on:

docker-compose.build-cloud.yaml

@@ -11,7 +11,10 @@ services:
       DATABASE_URL: ${DATABASE_URL}
       DATABASE_AUTH_TOKEN: ${DATABASE_AUTH_TOKEN}
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      FROM_EMAIL_ADDRESS: ${FROM_EMAIL_ADDRESS}
+      RESEND_API_KEY: ${RESEND_API_KEY}
       SENDGRID_API_KEY: ${SENDGRID_API_KEY}
+      VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS: ${VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS}
       INSTAPAPER_OAUTH_ID: ${INSTAPAPER_OAUTH_ID}
       INSTAPAPER_OAUTH_SECRET: ${INSTAPAPER_OAUTH_SECRET}
     ports:

docker-compose.build.yaml

@@ -25,7 +25,10 @@ services:
       NODE_ENV: production
       DATABASE_URL: http://libsql:8080
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      FROM_EMAIL_ADDRESS: ${FROM_EMAIL_ADDRESS}
+      RESEND_API_KEY: ${RESEND_API_KEY}
       SENDGRID_API_KEY: ${SENDGRID_API_KEY}
+      VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS: ${VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS}
       INSTAPAPER_OAUTH_ID: ${INSTAPAPER_OAUTH_ID}
       INSTAPAPER_OAUTH_SECRET: ${INSTAPAPER_OAUTH_SECRET}
     depends_on:

docker-compose.cloud.yaml

@@ -6,7 +6,10 @@ services:
       DATABASE_URL: ${DATABASE_URL}
       DATABASE_AUTH_TOKEN: ${DATABASE_AUTH_TOKEN}
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      FROM_EMAIL_ADDRESS: ${FROM_EMAIL_ADDRESS}
+      RESEND_API_KEY: ${RESEND_API_KEY}
       SENDGRID_API_KEY: ${SENDGRID_API_KEY}
+      VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS: ${VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS}
       INSTAPAPER_OAUTH_ID: ${INSTAPAPER_OAUTH_ID}
       INSTAPAPER_OAUTH_SECRET: ${INSTAPAPER_OAUTH_SECRET}
     ports:

docker-compose.yaml

@@ -21,7 +21,10 @@ services:
       NODE_ENV: production
       DATABASE_URL: http://libsql:8080
       BETTER_AUTH_SECRET: ${BETTER_AUTH_SECRET}
+      FROM_EMAIL_ADDRESS: ${FROM_EMAIL_ADDRESS}
+      RESEND_API_KEY: ${RESEND_API_KEY}
       SENDGRID_API_KEY: ${SENDGRID_API_KEY}
+      VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS: ${VITE_PUBLIC_SUPPORT_EMAIL_ADDRESS}
       INSTAPAPER_OAUTH_ID: ${INSTAPAPER_OAUTH_ID}
       INSTAPAPER_OAUTH_SECRET: ${INSTAPAPER_OAUTH_SECRET}
     depends_on:

package.json

@@ -9,10 +9,11 @@
     "dev:db:test:self-hosted": "turso dev --db-file serial-test-self-hosted.db --port 8082",
     "dev:migrate:test:main": "DATABASE_URL=http://127.0.0.1:8081 BETTER_AUTH_SECRET=test-secret-key-for-main-tests pnpm schema:migrate",
     "dev:migrate:test:self-hosted": "DATABASE_URL=http://127.0.0.1:8082 BETTER_AUTH_SECRET=test-secret-key-for-self-hosted-tests pnpm schema:migrate",
-    "dev:test:main": "concurrently --kill-others \"pnpm dev:db:test:main\" \"pnpm dev:migrate:test:main && DATABASE_URL=http://127.0.0.1:8081 BETTER_AUTH_SECRET=test-secret-key-for-main-tests BETTER_AUTH_BASE_URL=http://localhost:3002 VITE_PUBLIC_IS_MAIN_INSTANCE=true POLAR_ACCESS_TOKEN=test-token-for-e2e POLAR_WEBHOOK_SECRET=test-webhook-secret POLAR_STANDARD_MONTHLY_PRODUCT_ID=test-standard-monthly POLAR_STANDARD_ANNUAL_PRODUCT_ID=test-standard-annual POLAR_PRO_MONTHLY_PRODUCT_ID=test-pro-monthly POLAR_PRO_ANNUAL_PRODUCT_ID=test-pro-annual vite dev --port 3002\"",
+    "dev:test:main": "concurrently --kill-others \"pnpm dev:db:test:main\" \"pnpm dev:migrate:test:main && DATABASE_URL=http://127.0.0.1:8081 BETTER_AUTH_SECRET=test-secret-key-for-main-tests BETTER_AUTH_BASE_URL=http://localhost:3002 VITE_PUBLIC_IS_MAIN_INSTANCE=true POLAR_ACCESS_TOKEN=test-token-for-e2e POLAR_WEBHOOK_SECRET=test-webhook-secret POLAR_STANDARD_SMALL_QUOTA_MONTHLY_PRODUCT_ID=test-standard-small-monthly POLAR_STANDARD_SMALL_QUOTA_ANNUAL_PRODUCT_ID=test-standard-small-annual POLAR_STANDARD_MEDIUM_QUOTA_MONTHLY_PRODUCT_ID=test-standard-medium-monthly POLAR_STANDARD_MEDIUM_QUOTA_ANNUAL_PRODUCT_ID=test-standard-medium-annual POLAR_STANDARD_LARGE_QUOTA_MONTHLY_PRODUCT_ID=test-standard-large-monthly POLAR_STANDARD_LARGE_QUOTA_ANNUAL_PRODUCT_ID=test-standard-large-annual POLAR_PRO_MONTHLY_PRODUCT_ID=test-pro-monthly POLAR_PRO_ANNUAL_PRODUCT_ID=test-pro-annual vite dev --port 3002\"",
     "dev:test:self-hosted": "concurrently --kill-others \"pnpm dev:db:test:self-hosted\" \"pnpm dev:migrate:test:self-hosted && DATABASE_URL=http://127.0.0.1:8082 BETTER_AUTH_SECRET=test-secret-key-for-self-hosted-tests BETTER_AUTH_BASE_URL=http://localhost:3001 VITE_PUBLIC_IS_MAIN_INSTANCE=false vite dev --port 3001\"",
     "dev:migrate": "pnpm schema:migrate",
     "dev:atomic": "vite dev",
+    "dev:polar": "polar listen http://localhost:3000/api/auth/polar/webhooks",
     "dev": "concurrently --kill-others \"pnpm dev:db\" \"pnpm dev:migrate && pnpm dev:atomic\"",
     "dev:email": "email dev --dir ./src/emails --port 4000",
     "prebuild": "pnpm typecheck && pnpm format && pnpm lint",
@@ -86,6 +87,8 @@
     "@radix-ui/react-tooltip": "^1.2.8",
     "@react-email/components": "^1.0.11",
     "@sendgrid/mail": "^8.1.6",
+    "@sentry/browser": "^10.49.0",
+    "@sentry/node": "^10.49.0",
     "@t3-oss/env-core": "^0.13.11",
     "@tanstack/query-async-storage-persister": "^5.96.2",
     "@tanstack/react-query": "^5.96.2",
@@ -94,6 +97,7 @@
     "@tanstack/react-start": "1.167.16",
     "@tanstack/react-table": "^8.21.3",
     "@tanstack/zod-adapter": "1.166.9",
+    "@upstash/redis": "^1.37.0",
     "better-auth": "^1.5.6",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
@@ -124,6 +128,7 @@
     "remark-gfm": "^4.0.1",
     "remark-parse": "^11.0.0",
     "remark-rehype": "^11.1.2",
+    "resend": "^6.11.0",
     "rss-parser": "^3.13.0",
     "sonner": "^2.0.7",
     "superjson": "^2.2.6",