Remove the need for a DATABASE_URL

Since the application does not use a database, it's confusing to have to
set a bogus database URL environment variable. This change follows [the
Lucky guide][1] suggestion for disabling the need for database
configuration. That makes the setup a little easier.

[1]:
https://www.luckyframework.org/guides/database/intro-to-avram-and-orms

README.md

@@ -6,8 +6,6 @@ This is a project written using [Lucky](https://luckyframework.org). It's main w
 
 I'd love it if you deployed your own version of this app! A [few others](docs/instances.md) have already. To do so currently will take some knowledge of how a webserver runs. This app is built with the [Lucky framework](https://luckyframework.org) and there are a bunch of different ways to deploy. The main instance runs on [Ubuntu](https://luckyframework.org/guides/deploying/ubuntu) but there are also directions for [Heroku](https://luckyframework.org/guides/deploying/heroku) or [Dokku](https://luckyframework.org/guides/deploying/dokku).
 
-One thing to note is that this app doesn't currently use a database. Any instructions around postgres can be safely ignored. However, Lucky (and it's dependency Avram) do require a `DATABASE_URL` formatted for postgres. It doesn't need to be the URL of an actual database server though. Here's mine: `DATABASE_URL=postgres://does@not/mater`
-
 Hopefully a more comprehensive guide will be written at some point, but for now feel free to reach out to the [mailing list](https://lists.sr.ht/~edwardloveall/scribe) if you have any questions.
 
 ### Docker (Unsupported)
@@ -23,7 +21,7 @@ $ docker build [--build-arg PUID=1000] [--build-arg PGID=1000] -t scribe:latest
 To run (generating a base config from environment variables):
 
 ```
-$ docker run -it --rm -p 8080:8080 -e SCRIBE_PORT=8080 -e SCRIBE_HOST=0.0.0.0 -e SCRIBE_DB=postgres://does@not/matter scribe:latest
+$ docker run -it --rm -p 8080:8080 -e SCRIBE_PORT=8080 -e SCRIBE_HOST=0.0.0.0 scribe:latest
 ```
 
 To run with mounted config from local fs:
@@ -42,8 +40,6 @@ Other configuration needed when in `production` mode:
 
 * PORT: The port Scribe should run on
 * SECRET_KEY_BASE: A 32-bit string. Can be generated with `lucky gen.secret_key`
-* DATABASE_URL: May be any valid postgres url since Scribe doesn't use a database
-  * Example: `postgres://does@not/matter`
 * GITHUB_PERSONAL_ACCESS_TOKEN: to proxy gists with authenticated GitHub API requests
 * GITHUB_USERNAME: to proxy gists with authenticated GitHub API requests
 

config/database.cr

@@ -1,24 +1,10 @@
-database_name = "scribe_#{LuckyEnv.environment}"
-
-AppDatabase.configure do |settings|
-  if LuckyEnv.production?
-    settings.credentials = Avram::Credentials.parse(ENV["DATABASE_URL"])
-  else
-    settings.credentials = Avram::Credentials.parse?(ENV["DATABASE_URL"]?) || Avram::Credentials.new(
-      database: database_name,
-      hostname: ENV["DB_HOST"]? || "localhost",
-      port: ENV["DB_PORT"]?.try(&.to_i) || 5432,
-      username: ENV["DB_USERNAME"]? || "postgres",
-      password: ENV["DB_PASSWORD"]? || "postgres"
-    )
+class UnusedDB < Avram::Database
 end
+
+UnusedDB.configure do |settings|
+  settings.credentials = Avram::Credentials.void
 end
 
 Avram.configure do |settings|
-  settings.database_to_migrate = AppDatabase
-  settings.lazy_load_enabled = LuckyEnv.production?
-
-  # Always parse `Time` values with these specific formats.
-  # Used for both database values, and datetime input fields.
-  # settings.time_formats << "%F"
+  settings.database_to_migrate = UnusedDB
 end

script/docker_entrypoint

@@ -1,4 +1,4 @@
 #!/bin/sh
 
-echo -e "port: ${SCRIBE_PORT}\nhost: ${SCRIBE_HOST}\ndatabase: ${SCRIBE_DB}" > ./config/watch.yml
+echo -e "port: ${SCRIBE_PORT}\nhost: ${SCRIBE_HOST}" > ./config/watch.yml
 ./start_server

src/app.cr

@@ -6,7 +6,6 @@ Lucky::AssetHelpers.load_manifest "public/mix-manifest.json"
 require "./version"
 require "../config/server"
 require "../config/**"
-require "./app_database"
 require "./constants"
 require "./models/base_model"
 require "./models/mixins/**"

src/app_database.cr

@@ -1,2 +0,0 @@
-class AppDatabase < Avram::Database
-end

src/version.cr

@@ -1,3 +1,3 @@
 module Scribe
-  VERSION = "2022-04-04"
+  VERSION = "2022-05-21"
 end