Migrate email provider (from Brevo to generic SMTP) (#67)

This means we now need to have the text and HTML content set in the code, which is arguably better.

In order to avoid allowing legacy Brevo API Key support, this will also introduce breaking changes and will be released as v2.0.0.

I took the opportunity to remove a few deprecated things (like legacy ENV-based config), upgrade PostgreSQL, and pin a specific version in `docker-compose.yml`, since I don't plan to do breaking releases anytime soon, and upgrading PostgreSQL should be fine from now on if the version is pinned.

If you were using Brevo with an API Key, they support SMTP as well, just update your config.

If you were using ENV-based config, check `bewcloud.config.sample.ts`to create your `bewcloud.config.ts`.

If you need help upgrading you PostgreSQL container, I've written a simple guide [step-by-step guide](https://news.onbrn.com/step-by-step-guide-upgrading-postgresql-docker-containers/).

lib/config.ts

@@ -30,57 +30,10 @@ export class AppConfig {
         description: '',
         helpEmail: 'help@bewcloud.com',
       },
-    };
-  }
-
-  /** This allows for backwards-compatibility with the old config format, which was in the .env file. */
-  private static async getLegacyConfigFromEnv(): Promise<Config> {
-    const defaultConfig = this.getDefaultConfig();
-
-    if (typeof Deno === 'undefined') {
-      return defaultConfig;
-    }
-
-    await import('std/dotenv/load.ts');
-
-    const baseUrl = Deno.env.get('BASE_URL') ?? defaultConfig.auth.baseUrl;
-    const allowSignups = Deno.env.get('CONFIG_ALLOW_SIGNUPS') === 'true';
-    const enabledApps = (Deno.env.get('CONFIG_ENABLED_APPS') ?? '').split(',') as OptionalApp[];
-    const filesRootPath = Deno.env.get('CONFIG_FILES_ROOT_PATH') ?? defaultConfig.files.rootPath;
-    const enableEmailVerification = (Deno.env.get('CONFIG_ENABLE_EMAILS') ?? 'false') === 'true';
-    const enableForeverSignup = (Deno.env.get('CONFIG_ENABLE_FOREVER_SIGNUP') ?? 'true') === 'true';
-    const allowedCookieDomains = (Deno.env.get('CONFIG_ALLOWED_COOKIE_DOMAINS') || '').split(',').filter(
-      Boolean,
-    ) as string[];
-    const skipCookieDomainSecurity = Deno.env.get('CONFIG_SKIP_COOKIE_DOMAIN_SECURITY') === 'true';
-    const title = Deno.env.get('CUSTOM_TITLE') ?? defaultConfig.visuals.title;
-    const description = Deno.env.get('CUSTOM_DESCRIPTION') ?? defaultConfig.visuals.description;
-    const helpEmail = Deno.env.get('HELP_EMAIL') ?? defaultConfig.visuals.helpEmail;
-
-    return {
-      ...defaultConfig,
-      auth: {
-        ...defaultConfig.auth,
-        baseUrl,
-        allowSignups,
-        enableEmailVerification,
-        enableForeverSignup,
-        allowedCookieDomains,
-        skipCookieDomainSecurity,
-      },
-      files: {
-        ...defaultConfig.files,
-        rootPath: filesRootPath,
-      },
-      core: {
-        ...defaultConfig.core,
-        enabledApps,
-      },
-      visuals: {
-        ...defaultConfig.visuals,
-        title,
-        description,
-        helpEmail,
+      email: {
+        from: 'help@bewcloud.com',
+        host: 'localhost',
+        port: 465,
       },
     };
   }
@@ -90,18 +43,7 @@ export class AppConfig {
       return;
     }
 
-    let initialConfig = this.getDefaultConfig();
-
-    if (
-      typeof Deno.env.get('BASE_URL') === 'string' || typeof Deno.env.get('CONFIG_ALLOW_SIGNUPS') === 'string' ||
-      typeof Deno.env.get('CONFIG_ENABLED_APPS') === 'string'
-    ) {
-      console.warn(
-        '\nDEPRECATION WARNING: .env file has config variables. This will be used but is deprecated. Please use the bewcloud.config.ts file instead.',
-      );
-
-      initialConfig = await this.getLegacyConfigFromEnv();
-    }
+    const initialConfig = this.getDefaultConfig();
 
     const config: Config = {
       ...initialConfig,
@@ -128,13 +70,17 @@ export class AppConfig {
           ...config.visuals,
           ...configFromFile.visuals,
         },
+        email: {
+          ...config.email,
+          ...configFromFile.email,
+        },
       };
 
       console.info('\nConfig loaded from bewcloud.config.ts', JSON.stringify(this.config, null, 2), '\n');
 
       return;
     } catch (error) {
-      console.error('Error loading config from bewcloud.config.ts. Using default and legacy config instead.', error);
+      console.error('Error loading config from bewcloud.config.ts. Using default config instead.', error);
     }
 
     this.config = config;
@@ -217,4 +163,10 @@ export class AppConfig {
 
     return filesRootPath;
   }
+
+  static async getEmailConfig(): Promise<Config['email']> {
+    await this.loadConfig();
+
+    return this.config.email;
+  }
 }