Move out of Gitlab Wiki

I understand that this change is quite unreadable and hard to review, sorry for forgetting to do atomic commits. This patch does not change too much content wise, it just
* Gets everything from gitlab wiki
* Removes some specific gitlab hacks
* Formats all documentation file names to be in snake case so they look the same way as our code does

1 files changed, 222 insertions, 0 deletions

diff --git a/docs/installation/openbsd_en.md b/docs/installation/openbsd_en.md
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+# Installing on OpenBSD
+This guide describes the installation and configuration of pleroma (and the required software to run it) on a single OpenBSD 6.4 server.
+For any additional information regarding commands and configuration files mentioned here, check the man pages [online](https://man.openbsd.org/) or directly on your server with the man command.
+
+#### Required software
+The following packages need to be installed:
+  * elixir
+  * gmake
+  * ImageMagick
+  * git
+  * postgresql-server
+  * postgresql-contrib
+
+To install them, run the following command (with doas or as root):  
+`pkg_add elixir gmake ImageMagick git postgresql-server postgresql-contrib`
+
+Pleroma requires a reverse proxy, OpenBSD has relayd in base (and is used in this guide) and packages/ports are available for nginx (www/nginx) and apache (www/apache-httpd). Independently of the reverse proxy, [acme-client(1)](https://man.openbsd.org/acme-client) can be used to get a certificate from Let's Encrypt.
+
+#### Creating the pleroma user
+Pleroma will be run by a dedicated user, \_pleroma. Before creating it, insert the following lines in login.conf:
+```
+pleroma:\
+	:datasize-max=1536M:\
+	:datasize-cur=1536M:\
+	:openfiles-max=4096
+```
+This creates a "pleroma" login class and sets higher values than default for datasize and openfiles (see [login.conf(5)](https://man.openbsd.org/login.conf)), this is required to avoid having pleroma crash some time after starting.
+
+Create the \_pleroma user, assign it the pleroma login class and create its home directory (/home/\_pleroma/): `useradd -m -L pleroma _pleroma`
+
+#### Clone pleroma's directory
+Enter a shell as the \_pleroma user. As root, run `su _pleroma -;cd`. Then clone the repository with `git clone https://git.pleroma.social/pleroma/pleroma.git`. Pleroma is now installed in /home/\_pleroma/pleroma/, it will be configured and started at the end of this guide.
+
+#### Postgresql
+Start a shell as the \_postgresql user (as root run `su _postgresql -` then run the `initdb` command to initialize postgresql:  
+If you wish to not use the default location for postgresql's data (/var/postgresql/data), add the following switch at the end of the command: `-D <path>` and modify the `datadir` variable in the /etc/rc.d/postgresql script.
+
+When this is done, enable postgresql so that it starts on boot and start it. As root, run:
+```
+rcctl enable postgresql
+rcctl start postgresql
+```
+To check that it started properly and didn't fail right after starting, you can run `ps aux | grep postgres`, there should be multiple lines of output.
+
+#### httpd
+httpd will have three fuctions:
+  * redirect requests trying to reach the instance over http to the https URL
+  * serve a robots.txt file
+  * get Let's Encrypt certificates, with acme-client
+
+Insert the following config in httpd.conf:
+```
+# $OpenBSD: httpd.conf,v 1.17 2017/04/16 08:50:49 ajacoutot Exp $
+
+ext_inet="<IPv4 address>"
+ext_inet6="<IPv6 address>"
+
+server "default" {
+	listen on $ext_inet port 80 # Comment to disable listening on IPv4
+	listen on $ext_inet6 port 80 # Comment to disable listening on IPv6
+	listen on 127.0.0.1 port 80 # Do NOT comment this line
+
+	log syslog
+	directory no index
+
+	location "/.well-known/acme-challenge/*" {
+		root "/acme"
+		request strip 2
+	}
+
+	location "/robots.txt" { root "/htdocs/local/" }
+	location "/*" { block return 302 "https://$HTTP_HOST$REQUEST_URI" }
+}
+
+types {
+	include "/usr/share/misc/mime.types"
+}
+```
+Do not forget to change *\<IPv4/6 address\>* to your server's address(es). If httpd should only listen on one protocol family, comment one of the two first *listen* options.
+
+Create the /var/www/htdocs/local/ folder and write the content of your robots.txt in /var/www/htdocs/local/robots.txt.  
+Check the configuration with `httpd -n`, if it is OK enable and start httpd (as root):
+```
+rcctl enable httpd
+rcctl start httpd
+```
+
+#### acme-client
+acme-client is used to get SSL/TLS certificates from Let's Encrypt. 
+Insert the following configuration in /etc/acme-client.conf:
+```
+#
+# $OpenBSD: acme-client.conf,v 1.4 2017/03/22 11:14:14 benno Exp $
+#
+
+authority letsencrypt-<domain name> {
+	#agreement url "https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf"
+	api url "https://acme-v01.api.letsencrypt.org/directory"
+	account key "/etc/acme/letsencrypt-privkey-<domain name>.pem"
+}
+
+domain <domain name> {
+	domain key "/etc/ssl/private/<domain name>.key"
+	domain certificate "/etc/ssl/<domain name>.crt"
+	domain full chain certificate "/etc/ssl/<domain name>.fullchain.pem"
+	sign with letsencrypt-<domain name>
+	challengedir "/var/www/acme/"
+}
+```
+Replace *\<domain name\>* by the domain name you'll use for your instance. As root, run `acme-client -n` to check the config, then `acme-client -ADv <domain name>` to create account and domain keys, and request a certificate for the first time.  
+Make acme-client run everyday by adding it in /etc/daily.local. As root, run the following command: `echo "acme-client <domain name>" >> /etc/daily.local`.
+
+Relayd will look for certificates and keys based on the address it listens on (see next part), the easiest way to make them available to relayd is to create a link, as root run:
+```
+ln -s /etc/ssl/<domain name>.fullchain.pem /etc/ssl/<IP address>.crt
+ln -s /etc/ssl/private/<domain name>.key /etc/ssl/private/<IP address>.key
+```
+This will have to be done for each IPv4 and IPv6 address relayd listens on.
+
+#### relayd
+relayd will be used as the reverse proxy sitting in front of pleroma. 
+Insert the following configuration in /etc/relayd.conf:
+```
+# $OpenBSD: relayd.conf,v 1.4 2018/03/23 09:55:06 claudio Exp $
+
+ext_inet="<IPv4 address>"
+ext_inet6="<IPv6 address>"
+
+table <pleroma_server> { 127.0.0.1 }
+table <httpd_server> { 127.0.0.1 }
+
+http protocol plerup { # Protocol for upstream pleroma server
+	#tcp { nodelay, sack, socket buffer 65536, backlog 128 } # Uncomment and adjust as you see fit
+	tls ciphers "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305"
+	tls ecdhe secp384r1
+
+	# Forward some paths to the local server (as pleroma won't respond to them as you might want)
+	pass request quick path "/robots.txt" forward to <httpd_server>
+
+	# Append a bunch of headers
+	match request header append "X-Forwarded-For" value "$REMOTE_ADDR" # This two header and the next one are not strictly required by pleroma but adding them won't hurt
+	match request header append "X-Forwarded-By" value "$SERVER_ADDR:$SERVER_PORT"
+
+	match response header append "X-XSS-Protection" value "1; mode=block"
+	match response header append "X-Permitted-Cross-Domain-Policies" value "none"
+	match response header append "X-Frame-Options" value "DENY"
+	match response header append "X-Content-Type-Options" value "nosniff"
+	match response header append "Referrer-Policy" value "same-origin"
+	match response header append "X-Download-Options" value "noopen"
+	match response header append "Content-Security-Policy" value "default-src 'none'; base-uri 'self'; form-action 'self'; img-src 'self' data: https:; media-src 'self' https:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self'; connect-src 'self' wss://CHANGEME.tld; upgrade-insecure-requests;" # Modify "CHANGEME.tld" and set your instance's domain here
+	match request header append "Connection" value "upgrade"
+	#match response header append "Strict-Transport-Security" value "max-age=31536000; includeSubDomains" # Uncomment this only after you get HTTPS working.
+
+	# If you do not want remote frontends to be able to access your Pleroma backend server, comment these lines
+	match response header append "Access-Control-Allow-Origin" value "*"
+	match response header append "Access-Control-Allow-Methods" value "POST, PUT, DELETE, GET, PATCH, OPTIONS"
+	match response header append "Access-Control-Allow-Headers" value "Authorization, Content-Type, Idempotency-Key"
+	match response header append "Access-Control-Expose-Headers" value "Link, X-RateLimit-Reset, X-RateLimit-Limit, X-RateLimit-Remaining, X-Request-Id"
+	# Stop commenting lines here
+}
+
+relay wwwtls {
+	listen on $ext_inet port https tls # Comment to disable listening on IPv4
+	listen on $ext_inet6 port https tls # Comment to disable listening on IPv6
+
+	protocol plerup
+
+	forward to <pleroma_server> port 4000 check http "/" code 200
+	forward to <httpd_server> port 80 check http "/robots.txt" code 200
+}
+```
+Again, change *\<IPv4/6 address\>* to your server's address(es) and comment one of the two *listen* options if needed. Also change *wss://CHANGEME.tld* to *wss://\<your instance's domain name\>*.  
+Check the configuration with `relayd -n`, if it is OK enable and start relayd (as root):
+```
+rcctl enable relayd
+rcctl start relayd
+```
+
+#### pf
+Enabling and configuring pf is highly recommended.  
+In /etc/pf.conf, insert the following configuration:
+```
+# Macros
+if="<network interface>"
+authorized_ssh_clients="any"
+
+# Skip traffic on loopback interface
+set skip on lo
+
+# Default behavior
+set block-policy drop
+block in log all
+pass out quick
+
+# Security features
+match in all scrub (no-df random-id)
+block in log from urpf-failed
+
+# Rules
+pass in quick on $if inet proto icmp to ($if) icmp-type { echoreq unreach paramprob trace } # ICMP
+pass in quick on $if inet6 proto icmp6 to ($if) icmp6-type { echoreq unreach paramprob timex toobig } # ICMPv6
+pass in quick on $if proto tcp to ($if) port { http https } # relayd/httpd
+pass in quick on $if proto tcp from $authorized_ssh_clients to ($if) port ssh
+```
+Replace *\<network interface\>* by your server's network interface name (which you can get with ifconfig). Consider replacing the content of the authorized\_ssh\_clients macro by, for exemple, your home IP address, to avoid SSH connection attempts from bots.
+
+Check pf's configuration by running `pfctl -nf /etc/pf.conf`, load it with `pfctl -f /etc/pf.conf` and enable pf at boot with `rcctl enable pf`.
+
+#### Configure and start pleroma
+Enter a shell as \_pleroma (as root `su _pleroma -`) and enter pleroma's installation directory (`cd ~/pleroma/`).  
+Then follow the main installation guide:
+  * run `mix deps.get`
+  * run `mix pleroma.instance gen` and enter your instance's information when asked
+  * copy config/generated\_config.exs to config/prod.secret.exs. The default values should be sufficient but you should edit it and check that everything seems OK.
+  * exit your current shell back to a root one and run `psql -U postgres -f /home/_pleroma/config/setup_db.psql` to setup the database.
+  * return to a \_pleroma shell into pleroma's installation directory (`su _pleroma -;cd ~/pleroma`) and run `MIX_ENV=prod mix ecto.migrate`
+
+As \_pleroma in /home/\_pleroma/pleroma, you can now run `LC_ALL=en_US.UTF-8 MIX_ENV=prod mix phx.server` to start your instance.  
+In another SSH session/tmux window, check that it is working properly by running `ftp -MVo - http://127.0.0.1:4000/api/v1/instance`, you should get json output. Double-check that *uri*'s value is your instance's domain name.
+
+##### Starting pleroma at boot
+An rc script to automatically start pleroma at boot hasn't been written yet, it can be run in a tmux session (tmux is in base).