doc: replace mysql with sqlite

README.md

@@ -41,7 +41,7 @@ components
 
 Part information is:
 
-- stored in a MariaDB/mySQL database
+- stored in a sqlite3 database
 - retrieved using a sinatra HTTP/REST server
 - displayed using minimal HTML+JS pages
 
@@ -51,25 +51,18 @@ installation
 install software dependencies (here for Arch linux):
 
 ~~~
-sudo pacman -S mariadb
+sudo pacman -S sqlite ruby ruby-rake
-sudo pacman -S ruby-sinatra ruby-webrick
+gem install json sqlite3 sinatra puma
-pikaur -S ruby-mysql2
 ~~~
 
-configure database
+create database
 
 ~~~
-sudo mariadb-install-db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
+sqlite partdb.db < schema.sql
-sudo mysql
-CREATE DATABASE partdb;
-CREATE USER 'partdb'@localhost IDENTIFIED BY 'password';
-GRANT ALL PRIVILEGES ON partdb.* TO 'partdb'@localhost;
-exit
-mysql --user=partdb --password=password --database=partdb < schema.sql
 ~~~
 
-put the database access information in `credentials.json` and run `server.rb`.
+now just run `server.rb`.
 now go to http://localhost:4245 and you are ready to use it.
-the port is defined in `server.rb`.
+the port and database file is defined in `server.rb`.
 
 use a proxy web server to handle the authentication, TLS, compression, ...