Add nginx and systemd templates (#8770)

So they can be copied during installation instead of looking
them up in the documentation

Make default sidekiq configuration use weighted queues

Remove deprecated docs directory

config/sidekiq.yml

 ---
 :concurrency: 5
 :queues:
-  - default
-  - push
-  - mailers
-  - pull
+  - [default, 6]
+  - [push, 4]
+  - [mailers, 2]
+  - [pull]
 :schedule:
   subscriptions_scheduler:
     cron: '<%= Random.rand(0..59) %> <%= Random.rand(4..6) %> * * *'

dist/mastodon-sidekiq.service

+[Unit]
+Description=mastodon-sidekiq
+After=network.target
+
+[Service]
+Type=simple
+User=mastodon
+WorkingDirectory=/home/mastodon/live
+Environment="RAILS_ENV=production"
+Environment="DB_POOL=25"
+Environment="MALLOC_ARENA_MAX=2"
+ExecStart=/home/mastodon/.rbenv/shims/bundle exec sidekiq -c 25
+TimeoutSec=15
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

dist/mastodon-streaming.service

+[Unit]
+Description=mastodon-streaming
+After=network.target
+
+[Service]
+Type=simple
+User=mastodon
+WorkingDirectory=/home/mastodon/live
+Environment="NODE_ENV=production"
+Environment="PORT=4000"
+Environment="STREAMING_CLUSTER_NUM=1"
+ExecStart=/usr/bin/npm run start
+TimeoutSec=15
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

dist/mastodon-web.service

+[Unit]
+Description=mastodon-web
+After=network.target
+
+[Service]
+Type=simple
+User=mastodon
+WorkingDirectory=/home/mastodon/live
+Environment="RAILS_ENV=production"
+Environment="PORT=3000"
+ExecStart=/home/mastodon/.rbenv/shims/bundle exec puma -C config/puma.rb
+ExecReload=/bin/kill -SIGUSR1 $MAINPID
+TimeoutSec=15
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

dist/nginx.conf

+map $http_upgrade $connection_upgrade {
+  default upgrade;
+  ''      close;
+}
+
+proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=CACHE:10m inactive=7d max_size=1g;
+
+server {
+  listen 80;
+  listen [::]:80;
+  server_name example.com;
+  root /home/mastodon/live/public;
+  location /.well-known/acme-challenge/ { allow all; }
+  location / { return 301 https://$host$request_uri; }
+}
+
+server {
+  listen 443 ssl http2;
+  listen [::]:443 ssl http2;
+  server_name example.com;
+
+  ssl_protocols TLSv1.2;
+  ssl_ciphers HIGH:!MEDIUM:!LOW:!aNULL:!NULL:!SHA;
+  ssl_prefer_server_ciphers on;
+  ssl_session_cache shared:SSL:10m;
+
+  # Uncomment these lines once you acquire a certificate:
+  # ssl_certificate     /etc/letsencrypt/live/example.com/fullchain.pem;
+  # ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
+
+  keepalive_timeout    70;
+  sendfile             on;
+  client_max_body_size 80m;
+
+  root /home/mastodon/live/public;
+
+  gzip on;
+  gzip_disable "msie6";
+  gzip_vary on;
+  gzip_proxied any;
+  gzip_comp_level 6;
+  gzip_buffers 16 8k;
+  gzip_http_version 1.1;
+  gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+  add_header Strict-Transport-Security "max-age=31536000";
+
+  location / {
+    try_files $uri @proxy;
+  }
+
+  location ~ ^/(emoji|packs|system/accounts/avatars|system/media_attachments/files) {
+    add_header Cache-Control "public, max-age=31536000, immutable";
+    add_header Strict-Transport-Security "max-age=31536000";
+    try_files $uri @proxy;
+  }
+
+  location /sw.js {
+    add_header Cache-Control "public, max-age=0";
+    add_header Strict-Transport-Security "max-age=31536000";
+    try_files $uri @proxy;
+  }
+
+  location @proxy {
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto https;
+    proxy_set_header Proxy "";
+    proxy_pass_header Server;
+
+    proxy_pass http://127.0.0.1:3000;
+    proxy_buffering on;
+    proxy_redirect off;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection $connection_upgrade;
+
+    proxy_cache CACHE;
+    proxy_cache_valid 200 7d;
+    proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;
+    add_header X-Cached $upstream_cache_status;
+    add_header Strict-Transport-Security "max-age=31536000";
+
+    tcp_nodelay on;
+  }
+
+  location /api/v1/streaming {
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto https;
+    proxy_set_header Proxy "";
+
+    proxy_pass http://127.0.0.1:4000;
+    proxy_buffering off;
+    proxy_redirect off;
+    proxy_http_version 1.1;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection $connection_upgrade;
+
+    tcp_nodelay on;
+  }
+
+  error_page 500 501 502 503 504 /500.html;
+}

docs/Contributing-to-Mastodon/Sponsors.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Contributing-to-Mastodon/Sponsors.md)

docs/Contributing-to-Mastodon/Translating.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Contributing-to-Mastodon/Translating.md)

docs/Extensions.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Extensions.md)

docs/README.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/README.md)

docs/Running-Mastodon/Administration-guide.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Administration-guide.md)

docs/Running-Mastodon/Development-guide.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Development-guide.md)

docs/Running-Mastodon/Heroku-guide.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Heroku-guide.md)

docs/Running-Mastodon/Production-guide.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Production-guide.md)

docs/Running-Mastodon/Scalingo-guide.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Scalingo-guide.md)

docs/Running-Mastodon/Tuning.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Tuning.md)

docs/Running-Mastodon/Vagrant-guide.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Vagrant-guide.md)

docs/Specs-and-RFCs-used.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Specs-and-RFCs-used.md)

docs/Using-Mastodon/2FA.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/2FA.md)

docs/Using-Mastodon/Apps.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/Apps.md)

docs/Using-Mastodon/FAQ.md

-[The documentation has moved to its own repository](https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/FAQ.md)