Add zero-config self hosting on Render (#612)

* v1 of backend implementation for self hosting

* Add docs

* Add upgrades controller

* Add global helpers for self hosting mode

* Add self host settings controller

* Conditionally show self hosting settings

* Environment and config updates

* Complete upgrade prompting flow

* Update config for forked repo

* Move configuration of github provider within class

* Add upgrades cron

* Update deploy button

* Update guides

* Fix render deployer

* Typo

* Enable auto upgrades

* Fix cron

* Make upgrade modes more clear and consistent

* Trigger new available version

* Fix logic for displaying upgrade prompts

* Finish implementation

* Fix regression

* Trigger new version

* Add i18n translations

* trigger new version

* reduce caching time for testing

* Decrease cache for testing

* trigger upgrade

* trigger upgrade

* Only trigger deploy once

* trigger upgrade

* If target is commit, always upgrade if any upgrade is available

* trigger upgrade

* trigger upgrade

* Test release

* Change back to maybe repo for defaults

* Fix lint errors

* Clearer naming

* Fix relative link

* Add abs path

* Relative link

* Update docs

render.yaml

@@ -0,0 +1,57 @@
+databases:
+  - name: maybe
+    user: maybe
+    plan: free
+
+services:
+  - type: web
+    plan: free
+    autoDeploy: false
+    runtime: ruby
+    name: maybe
+    repo: https://github.com/maybe-finance/maybe.git
+    branch: main
+    healthCheckPath: /up
+    buildCommand: "./bin/render-build.sh"
+    preDeployCommand: "bundle exec rails db:migrate"
+    startCommand: "bundle exec rails server"
+    envVars:
+      - key: DATABASE_URL
+        fromDatabase:
+          name: maybe
+          property: connectionString
+
+      - key: SELF_HOSTING_ENABLED
+        value: true
+      - key: HOSTING_PLATFORM
+        value: render
+
+      # Since the app is self-hosted, we cannot use master.key to encrypt credentials.  App depends entirely on ENV variables
+      # https://api.rubyonrails.org/v7.1.3.2/classes/Rails/Application.html#method-i-secret_key_base
+      #
+      # To generate this, run: `openssl rand -hex 64` or `rails secret`
+      - key: SECRET_KEY_BASE
+        sync: false
+
+      - key: WEB_CONCURRENCY
+        value: 2
+      - key: GOOD_JOB_EXECUTION_MODE
+        value: async # Typically, `external` is used in prod, but this avoids another cron service and is generally fine for a self-hoster given low traffic
+
+      # The app uses this info to know which repo to fetch latest commit data from for upgrades
+      # This should MATCH the `repo` and `branch` keys in the config above ALWAYS
+      - key: GITHUB_REPO_OWNER
+        value: maybe-finance
+      - key: GITHUB_REPO_NAME
+        value: maybe
+      - key: GITHUB_REPO_BRANCH
+        value: main
+
+      # Required to allow your self-hosted instance to be able to upgrade itself
+      - key: UPGRADES_ENABLED
+        value: true
+
+      # If you upgrade your instance to a paid plan, you can set this to false (or remove it)
+      # See note in `render-build.sh` script.
+      - key: RUN_DB_MIGRATIONS_IN_BUILD_STEP
+        value: true