Use PostgreSQL instead of MongoDB (#4572)

* wip

* Update note.ts

* Update timeline.ts

* Update core.ts

* wip

* Update generate-visibility-query.ts

* wip

* wip

* wip

* wip

* wip

* Update global-timeline.ts

* wip

* wip

* wip

* Update vote.ts

* wip

* wip

* Update create.ts

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update files.ts

* wip

* wip

* Update CONTRIBUTING.md

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update read-notification.ts

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update cancel.ts

* wip

* wip

* wip

* Update show.ts

* wip

* wip

* Update gen-id.ts

* Update create.ts

* Update id.ts

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Docker: Update files about Docker (#4599)

* Docker: Use cache if files used by `yarn install` was not updated

This patch reduces the number of times to installing node_modules.
For example, `yarn install` step will be skipped when only ".config/default.yml" is updated.

* Docker: Migrate MongoDB to Postgresql

Misskey uses Postgresql as a database instead of Mongodb since version 11.

* Docker: Uncomment about data persistence

This patch will save a lot of databases.

* wip

* wip

* wip

* Update activitypub.ts

* wip

* wip

* wip

* Update logs.ts

* wip

* Update drive-file.ts

* Update register.ts

* wip

* wip

* Update mentions.ts

* wip

* wip

* wip

* Update recommendation.ts

* wip

* Update index.ts

* wip

* Update recommendation.ts

* Doc: Update docker.ja.md and docker.en.md (#1) (#4608)

Update how to set up misskey.

* wip

* ✌️

* wip

* Update note.ts

* Update postgre.ts

* wip

* wip

* wip

* wip

* Update add-file.ts

* wip

* wip

* wip

* Clean up

* Update logs.ts

* wip

* 🍕

* wip

* Ad notes

* wip

* Update api-visibility.ts

* Update note.ts

* Update add-file.ts

* tests

* tests

* Update postgre.ts

* Update utils.ts

* wip

* wip

* Refactor

* wip

* Refactor

* wip

* wip

* Update show-users.ts

* Update update-instance.ts

* wip

* Update feed.ts

* Update outbox.ts

* Update outbox.ts

* Update user.ts

* wip

* Update list.ts

* Update update-hashtag.ts

* wip

* Update update-hashtag.ts

* Refactor

* Update update.ts

* wip

* wip

* ✌️

* clean up

* docs

* Update push.ts

* wip

* Update api.ts

* wip

* ✌️

* Update make-pagination-query.ts

* ✌️

* Delete hashtags.ts

* Update instances.ts

* Update instances.ts

* Update create.ts

* Update search.ts

* Update reversi-game.ts

* Update signup.ts

* Update user.ts

* id

* Update example.yml

* 🎨

* objectid

* fix

* reversi

* reversi

* Fix bug of chart engine

* Add test of chart engine

* Improve test

* Better testing

* Improve chart engine

* Refactor

* Add test of chart engine

* Refactor

* Add chart test

* Fix bug

* コミットし忘れ

* Refactoring

* ✌️

* Add tests

* Add test

* Extarct note tests

* Refactor

* 存在しないユーザーにメンションできなくなっていた問題を修正

* Fix bug

* Update update-meta.ts

* Fix bug

* Update mention.vue

* Fix bug

* Update meta.ts

* Update CONTRIBUTING.md

* Fix bug

* Fix bug

* Fix bug

* Clean up

* Clean up

* Update notification.ts

* Clean up

* Add mute tests

* Add test

* Refactor

* Add test

* Fix test

* Refactor

* Refactor

* Add tests

* Update utils.ts

* Update utils.ts

* Fix test

* Update package.json

* Update update.ts

* Update manifest.ts

* Fix bug

* Fix bug

* Add test

* 🎨

* Update endpoint permissions

* Updaye permisison

* Update person.ts

#4299

* データベースと同期しないように

* Fix bug

* Fix bug

* Update reversi-game.ts

* Use a feature of Node v11.7.0 to extract a public key (#4644)

* wip

* wip

* ✌️

* Refactoring

#1540

* test

* test

* test

* test

* test

* test

* test

* Fix bug

* Fix test

* 🍣

* wip

* #4471

* Add test for #4335

* Refactor

* Fix test

* Add tests

* 🕓

* Fix bug

* Add test

* Add test

* rename

* Fix bug

.config/docker_example.env

@@ -0,0 +1,5 @@
+# db settings
+POSTGRES_PASSWORD="example-misskey-pass"
+POSTGRES_USER="example-misskey-user"
+POSTGRES_DB="misskey"
+

.config/example.yml

@@ -1,8 +1,16 @@
+#━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+# Misskey configuration
+#━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+#   ┌─────┐
+#───┘ URL └─────────────────────────────────────────────────────
+
 # Final accessible URL seen by a user.
 url: https://example.tld/
 
+#   ┌───────────────────────┐
+#───┘ Port and TLS settings └───────────────────────────────────
 
-### Port and TLS settings ######################################
 #
 # Misskey supports two deployment options for public.
 #
@@ -30,28 +38,51 @@ url: https://example.tld/
 #   You need to set Certificate in 'https' section.
 
 # To use option 1, uncomment below line.
-# port: 3000    # A port that your Misskey server should listen.
+#port: 3000    # A port that your Misskey server should listen.
 
 # To use option 2, uncomment below lines.
-# port: 443
-#
-# https:
-#   # path for certification
-#   key: /etc/letsencrypt/live/example.tld/privkey.pem
-#   cert: /etc/letsencrypt/live/example.tld/fullchain.pem
+#port: 443
 
-################################################################
+#https:
+#  # path for certification
+#  key: /etc/letsencrypt/live/example.tld/privkey.pem
+#  cert: /etc/letsencrypt/live/example.tld/fullchain.pem
 
+#   ┌──────────────────────────┐
+#───┘ PostgreSQL configuration └────────────────────────────────
 
-mongodb:
+db:
   host: localhost
-  port: 27017
+  port: 5432
+
+  # Database name
   db: misskey
+
+  # Auth
   user: example-misskey-user
   pass: example-misskey-pass
 
+#   ┌─────────────────────┐
+#───┘ Redis configuration └─────────────────────────────────────
+
+#redis:
+#  host: localhost
+#  port: 6379
+#  pass: example-pass
+
+#   ┌─────────────────────────────┐
+#───┘ Elasticsearch configuration └─────────────────────────────
+
+#elasticsearch:
+#  host: localhost
+#  port: 9200
+#  pass: null
+
+#   ┌────────────────────────────────────┐
+#───┘ File storage (Drive) configuration └──────────────────────
+
 drive:
-  storage: 'db'
+  storage: 'fs'
 
   # OR
 
@@ -88,26 +119,44 @@ drive:
   #   accessKey: XXX
   #   secretKey: YYY
 
+#   ┌───────────────┐
+#───┘ ID generation └───────────────────────────────────────────
+
+# You can select the ID generation method.
+# You don't usually need to change this setting, but you can
+# change it according to your preferences.
+
+# Available methods:
+# aid1 ... Use AID for ID generation (with random 1 char)
+# aid2 ... Use AID for ID generation (with random 2 chars)
+# aid3 ... Use AID for ID generation (with random 3 chars)
+# aid4 ... Use AID for ID generation (with random 4 chars)
+# ulid ... Use ulid for ID generation
+# objectid ... This is left for backward compatibility.
+
+# AID(n) is the original ID generation method.
+# The trailing n represents the number of random characters that
+# will be suffixed.
+# The larger n is the safer. If n is small, the possibility of
+# collision at the same time increases, but there are also
+# advantages such as shortening of the URL.
+
+# ULID: Universally Unique Lexicographically Sortable Identifier.
+# for more details: https://github.com/ulid/spec
+# * Normally, AID should be sufficient.
+
+# ObjectID is the method used in previous versions of Misskey.
+# * Choose this if you are migrating from a previous Misskey.
+
+id: 'aid2'
+
+#   ┌─────────────────────┐
+#───┘ Other configuration └─────────────────────────────────────
+
 # If enabled:
 #  The first account created is automatically marked as Admin.
 autoAdmin: true
 
-#
-# Below settings are optional
-#
-
-# Redis
-#redis:
-#  host: localhost
-#  port: 6379
-#  pass: example-pass
-
-# Elasticsearch
-#elasticsearch:
-#  host: localhost
-#  port: 9200
-#  pass: null
-
 # Whether disable HSTS
 #disableHsts: true
 

.config/mongo_initdb_example.js

@@ -1,13 +0,0 @@
-var user = {
-	user: 'example-misskey-user',
-	pwd: 'example-misskey-pass',
-	roles: [
-	    {
-		    role: 'readWrite',
-		    db: 'misskey'
-	    }
-	]
-};
-
-db.createUser(user);
-