Doc update and SQL init

db-init/02-import-data.sql

@@ -0,0 +1,15 @@
+-- Import airports data from CSV
+LOAD DATA INFILE '/var/lib/mysql-files/airports_data.csv' 
+INTO TABLE airports 
+FIELDS TERMINATED BY ',' 
+OPTIONALLY ENCLOSED BY '"'
+LINES TERMINATED BY '\n'
+(icao, iata, name, country);
+
+-- Import aircraft data from CSV  
+LOAD DATA INFILE '/var/lib/mysql-files/aircraft_data.csv'
+INTO TABLE aircraft
+FIELDS TERMINATED BY ','
+OPTIONALLY ENCLOSED BY '"'
+LINES TERMINATED BY '\n'
+(icao24, registration, manufacturer_icao, type_code, manufacturer_name, model);